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Best Mosquito Repellent That Actually Works (2026)

Ultrasonic mosquito repellers made no difference to mosquito landings across 10 field studies, while 20% picaridin protects for hours without harming plastics or fabrics.

  • No. 1: 20% picaridin repellent
  • 10 places

01Final list

The leading AIs each built their own list of ten independently. Here is one result that is easy to check: every place has a reason, a source, and the list of AIs that included it.

Order: from most to least AI agreement.

A bright badge means this AI put the entry on its list. A dim badge means it did not.

  1. 1

    20% picaridin repellent

    About 8–14 hours of protection by EPA-registration figures (another chart says 6–8). It did well in Consumer Reports tests and does not damage plastics as strong DEET can.

    Included it: Gemini, Claude, ChatGPT.

    In their lists: Gemini: 1 · Claude: 1 · ChatGPT: 2

    What each AI noted 3
    • Geminiplace 1

      Matches 30% DEET minute-for-minute across 8 to 14 hours without dissolving watch faces, sunglasses, or synthetic technical garments.

    • Claudeplace 1

      EPA-registration figures put 20% picaridin at about 8-14 hours of protection, and it does not damage plastics the way high-strength DEET can.

      Source ↗
    • ChatGPTplace 2

      Picaridin is CDC-listed and is a practical alternative when you want effective skin protection without DEET’s material damage concern.

      Source ↗
    3 AIs put it here
    Source ↗
  2. 2

    IR3535 repellent

    EPA-registered and recommended by CDC, but no head-to-head protection time was confirmed. Labels vary, and one estimate puts it at 4–8 hours.

    Included it: Gemini, Claude, ChatGPT.

    In their lists: Gemini: 7 · Claude: 5 · ChatGPT: 4

    What each AI noted 3
    • Geminiplace 7

      A synthetic beta-alanine amino acid derivative favored throughout Europe for its soft skin feel and gentle pediatric profile.

    • Claudeplace 5

      The fourth EPA-listed active ingredient: it is registered for mosquitoes, but I found no head-to-head numbers.

      Source ↗
    • ChatGPTplace 4

      It is one of CDC’s four familiar long-lasting active ingredients, but actual labeled protection varies by product.

      Source ↗
    3 AIs put it here
    Source ↗
  3. 3

    Citronella candles

    A patio favourite, yet Consumer Reports found little evidence that they protect, and a 2026 field test in Mali measured minimal or no effect.

    Included it: Gemini, Claude, ChatGPT.

    In their lists: Gemini: 9 · Claude: 7 · ChatGPT: see list

    What each AI noted 3
    • Geminiplace 9

      A multi-million-dollar summer staple whose flickering flame and pleasant smoke reduce biting pressure by less than 15% in controlled tests.

      Source ↗
    • Claudeplace 7

      Popular on patios, but Consumer Reports found little evidence of solid protection.

      Source ↗
    • ChatGPT

      Named differently in its own list: open the full list.

      see list
    3 AIs put it here
    Source ↗
  4. More about the top three ↓
  5. 4

    DEET 20–30% repellent

    Consumer Reports' two top-scoring sprays were DEET, with the best range at 15–30%. It is still the best-selling ingredient but can damage synthetic fabrics and plastics.

    Included it: Gemini, Claude, ChatGPT.

    In their lists: Gemini: 2 · Claude: 2 · ChatGPT: 1

    What each AI noted 3
    • Geminiplace 2

      The 70-year benchmark that shields against every biting species on Earth, though it softens plastic eyeglass frames and synthetic watchbands.

      Source ↗
    • Claudeplace 2

      Consumer Reports' top two sprays were 30% and similar-strength DEET products, and the best DEET range was 15-30%.

      Source ↗
    • ChatGPTplace 1

      DEET concentrations above about 50% add little mosquito protection time, while DEET can damage some synthetic materials.

      Source ↗
    3 AIs put it here
    Source ↗
  6. 5

    Oil of lemon eucalyptus (OLE / PMD) 30%

    The only plant-derived ingredient CDC recommends, and a 30% product did well in Consumer Reports tests. Charts disagree on its protection time: about 6 hours versus about 2.

    Included it: Gemini, Claude, ChatGPT.

    In their lists: Gemini: 4 · Claude: 3 · ChatGPT: 3

    What each AI noted 3
    • Geminiplace 4

      The sole botanical repellent backed by CDC testing that rivals DEET, delivering 6 hours of protection from refined Corymbia citriodora extract.

    • Claudeplace 3

      The only plant-derived repellent the CDC and EPA guidance lists, but charts disagree: about 6 hours in one, about 2 hours in others.

    • ChatGPTplace 3

      CDC recommends formulated OLE/PMD products but says not to use them on children under 3.

      Source ↗
    3 AIs put it here
    Source ↗
  7. 6

    Spatial repellent devices (transfluthrin, metofluthrin)

    In a Peru trial (a preprint), they cut Aedes-borne infections by 34.1%. In Mali in 2026, devices cut Aedes catches from 14.33 to under 1, though wind and placement matter.

    Included it: Gemini, Claude, ChatGPT.

    In their lists: Gemini: 6 · Claude: 4 · ChatGPT: 8

    What each AI noted 3
    • Geminiplace 6

      Creates an invisible 15-foot defensive perimeter outdoors by vaporizing synthetic pyrethroids, cutting landing rates by 80% in still air.

    • Claudeplace 4

      In a cluster-randomised trial in Iquitos, Peru, a spatial repellent cut Aedes-borne virus infection by 34.1%, which is rare field evidence for a gadget.

      Source ↗
    • ChatGPTplace 8

      In a 2026 field comparison in Mali, heat-activated devices cut trap counts sharply, but results depend on species, wind, placement, and setting.

      Source ↗
    3 AIs put it here
    Source ↗
  8. 7

    Ultrasonic mosquito repellers

    Cochrane reviewed 10 field studies and found no difference in mosquito landings with the devices on or off. The review was closed in 2010 because the answer was considered settled.

    Included it: Gemini, Claude, ChatGPT.

    In their lists: Gemini: 8 · Claude: 9 · ChatGPT: 9

    What each AI noted 3
    • Geminiplace 8

      Offers less than 60 minutes of additional protection over 30% DEET while dramatically increasing skin absorption and melted plastics.

    • Claudeplace 9

      Cochrane found no significant difference in mosquito landings with the device on or off.

      Source ↗
    • ChatGPTplace 9

      Coils can protect a circumscribed area, but evidence for preventing malaria infection remains uncertain.

      Source ↗
    3 AIs put it here
    Source ↗
  9. 8

    Permethrin-treated clothing (underused)

    CDC recommends treating clothing and gear with permethrin, never skin. It is an underused layer, and no reliable figure on how many people use it was found.

    Included it: Gemini, ChatGPT. Did not include: Claude.

    In their lists: Gemini: 3 · ChatGPT: 5

    What each AI noted 2
    • Geminiplace 3

      The single most underused defense: kills mosquitoes upon contact with fabric and survives 6 machine washings without touching your skin.

      Source ↗
    • ChatGPTplace 5

      Permethrin belongs on clothing and gear, never directly on skin.

      Source ↗
    2 AIs put it here
    Source ↗
  10. 9

    Window and door screens (underused)

    A barrier you never reapply. CDC says to repair screens, and a randomised trial in Mérida, Mexico, tested screening against indoor Aedes mosquitoes.

    Included it: Gemini, ChatGPT. Did not include: Claude.

    In their lists: Gemini: 5 · ChatGPT: 6

    What each AI noted 2
    • Geminiplace 5

      A passive physical barrier providing 100% mechanical protection indoors that eliminates chemical exposure entirely.

      Source ↗
    • ChatGPTplace 6

      Screens prevent mosquitoes from entering the home without requiring a fresh skin application; field studies also find reduced indoor mosquito populations.

      Source ↗
    2 AIs put it here
    Source ↗
  11. 10

    Mosquito repellent wristbands

    Sold as wearable protection, but the FTC took action against the maker Viatek over protection claims that lacked scientific support.

    Included it: Gemini, Claude. Did not include: ChatGPT.

    In their lists: Gemini: 10 · Claude: 8

    What each AI noted 2
    • Geminiplace 10

      Ranks among the most lucrative pest gimmicks on global retail shelves despite a definitive Cochrane review proving zero effect on mosquito bites.

    • Claudeplace 8

      The FTC fined one wristband maker, Viatek, for protection claims that lacked scientific support.

      Source ↗
    2 AIs put it here
    Source ↗

02More about the top three

The ranking is above. Here is more about the three places at the top: what they are, why they are here, and what is worth knowing.

The three are not measured the same way: hours of protection come from EPA labels and estimates, while the candle result comes from field catch counts.

120% picaridin repellent

No. 1 — 20% picaridin repellent. On the lists of 3 of 3 AIs; median place there: 1. The AIs put it first because its protection lasts for hours, it did well in Consumer Reports tests, and it doesn't damage plastics.

Did you know

  • Picaridin does not dissolve plastics, synthetics or sealants, unlike DEET. That makes it the safer pick for watch straps, phone cases and camping gear.

    Source ↗
What it is
A skin spray or lotion with 20% picaridin as the active ingredient.
Its edge
Protects longest of the three, and it is gentle on watches, sunglasses and synthetic clothes.
Who it suits
Suits hikers and campers with plastic gear; those who want a plant-based option may not like it.
  • Protection against mosquitoes8–14 hours (EPA figures)
Why it is here

  • Consumer Reports recommended 3 sprays with 20% picaridin; sprays did better than 20% lotions and wipes in its tests. — (voice only)

    Source ↗

  • An EPA product label lists a claim of mosquito protection for up to 12 hours and says the product does not damage plastic. — (voice only)

    Source ↗
Did you know

  • Picaridin was renamed Saltidin in 2008, after Lanxess and its subsidiary Saltigo were spun off from Bayer in 2005. The EU approval was renewed on 23 July 2020 and is valid for ten years from 1 February 2022.

    Source ↗
Keep in mind

  • A forum user says Consumer Reports gave Sawyer's picaridin lotion 4 out of 100 for mosquitoes, with 'Poor performance at repelling mosquitoes'. This is a commenter's claim, not checked here, and it may work better against ticks.

    Source ↗
Where to go further

  • Open this older EPA label for a picaridin repellent and find the line on how many hours it protects against mosquitoes. Compare it with the label on a product you can buy today. — (voice only)

    Source ↗
Compare the top three ↓

2IR3535 repellent

No. 2 — IR3535 repellent. On the lists of 3 of 3 AIs; median place there: 5. The AIs put it in the middle because it is EPA-registered and CDC-recommended, but they found no head-to-head proof of how long it lasts.

Did you know

  • Unlike icaridin (picaridin), IR3535 can dissolve some plastics and synthetic fabrics. Polyethylene and polypropylene are exceptions. Check your gear before spraying.

    Source ↗
What it is
A skin repellent made from IR3535, a man-made relative of an amino acid.
Its edge
Officially recognised and trusted, but its protection time is less clear than picaridin's.
Who it suits
Suits people who want an approved skin repellent and will check the label; gear owners should be careful.
  • Protection against mosquitoes4–8 hours (one estimate)
Why it is here

  • An EPA-accepted label for 20% IR3535 spray includes an 8-hour protection claim, showing how the time can vary by product and label. — (voice only)

    Source ↗
Did you know

  • IR3535 is made from beta-alanine, an amino acid that is not one of the standard protein-building ones. It was developed and sold by the German company Merck KGaA.

    Source ↗
Keep in mind

  • Consumer Reports did not test Avon's IR3535 product. It says, 'we think combination products are a bad idea', because they could mean too much repellent. No protection time is given.

    Source ↗

  • One buyer review says the only bugs it doesn't work against are horse and yellow flies. Reviews on that page are personal stories, not lab tests.

    Source ↗
Where to go further

  • Open this older EPA label for an IR3535 repellent. Look first at the IR3535 percentage and the hours of protection written on it, then compare them with a current label. — (voice only)

    Source ↗
Compare the top three ↓

3Citronella candles

No. 3 — Citronella candles. On the lists of 3 of 3 AIs; median place there: 8. The AIs put it last because tests found little or no real protection from the candle, however popular it is on patios.

Did you know

  • In a study of botanical repellents, indoor citronella candles (88 g, 5% active ingredient) repelled only 14% of mosquitoes. Citronella diffusers repelled 68%. The candles are the weaker form.

    Source ↗
What it is
A wax candle with citronella oil, burned outdoors or indoors to keep mosquitoes away.
Its edge
None on protection: field and lab tests showed little or no benefit over nothing.
Who it suits
Fine for atmosphere on a patio; not for anyone who needs real protection from bites.
  • Protection against mosquitoesLittle or no effect
Why it is here

  • In the 2026 Mali field trial, the 3% citronella candle gave little or no measurable protection at either test site; its results were statistically similar to the untreated control in nearly all comparisons. — (voice only)

    Source ↗

  • At the rural site, the candle averaged 10.08 mosquitoes caught for Culex and 25.88 for Anopheles; the untreated control averaged 15.79 and 34.96, respectively. The study found no significant protection from the candle. — (voice only)

    Source ↗
History

  • A 1943 citronella candle patent describes a practical snag: ordinary wax and standard citronella oil did not work well together. The inventor’s solution used refined paraffin and a thicker oil. — (voice only)

    Source ↗
Keep in mind

  • A cited study found citronella candles cut bites only modestly over 80 minutes, and a plain candle did about the same. Another study measured only about 29% repellency, even indoors.

    Source ↗

  • Smoke only repels mosquitoes that touch it. Day says they 'go around it and come to you from the other side'. He suggests fans and skin repellents for real protection.

    Source ↗
What people say

  • The torches and candles might have a nice ambiance to them, but they don't work in terms of keeping bugs away. — Jonathan Day, University of Florida mosquito researcher

    Source ↗
Where to go further

  • Read the 2015 Consumer Reports test. Start with the setup: 250 aggressive mosquitoes in a simulated backyard barbecue room, then the result for the citronella bucket. — (voice only)

    Source ↗
Compare the top three ↓

The top three side by side

20% picaridin repellentIR3535 repellentCitronella candles
In the AIs' lists3 / 33 / 33 / 3
Protection against mosquitoes8–14 hours (EPA figures)4–8 hours (one estimate)Little or no effect
Put first byGemini, Claude——

Places with the same number of AIs are ordered by their average place in the AIs' own lists.

More ratings

03Worth knowing

What the AIs noticed while building the list.

Sources disagree on where extra DEET stops helping. CDC says around 50%, other sources say about 30%, and UNC gives 30% about 4–6 h and 50% about 6–8 h.

Noticed by:
Included it: Gemini, Claude, ChatGPT.
Source ↗

Strength matters differently for each ingredient: 5% picaridin did poorly in Consumer Reports tests while 20% did well.

Noticed by:
Included it: Claude. Did not include: Gemini, ChatGPT.
Source ↗

Raw lemon eucalyptus essential oil is not the same as registered OLE/PMD, which is refined to last for hours.

Noticed by:
Included it: Gemini. Did not include: Claude, ChatGPT.
Source ↗

DEET still leads sales and alternatives are gaining. No representative survey of what people actually use was found, only platform sales rankings.

Noticed by:
Included it: Claude, ChatGPT. Did not include: Gemini.
Source ↗

04Questions people ask

Is there a mosquito repellent that actually works?

Yes. EPA-registered DEET (15–30%), 20% picaridin and oil of lemon eucalyptus did well in tests, giving about 4–14 hours of protection depending on ingredient and source.

Source ↗
Which mosquito repellent works best?

DEET sprays scored highest in Consumer Reports tests, with 20% picaridin and 30% OLE close behind. 20% picaridin has the longest quoted protection, about 8–14 hours.

Source ↗
Why do protection times differ between sources?

Charts use different tests and products. For example, 20% picaridin is quoted at 8–14 hours in one source and 6–8 in another.

Source ↗
How to prevent mosquito bites?

Use an EPA-registered repellent, wear long sleeves, treat clothing with permethrin, repair screens and empty standing water weekly.

Source ↗

05How we counted

In plain words, no formulas.

1The question

Top 10 Ways to Stop Mosquito Bites: What Works vs. What People Buy

2Why this topic

It sets lab and field evidence against what people actually buy, a gap that no single study or sales chart shows.

3Where it applies

Global, personal protection

4What we looked at

  • Measured protection: complete protection time in standard tests, and reductions in bites or infections in field trials
  • Real-world use: how widely each product or method is bought and used
  • Practical fit: hours of protection per application, skin tolerance and damage to fabrics and plastics. Methods with strong evidence but little use are shown as a separate 'underused' group
  • CDC prevention guidance and EPA repellent search — Registered active ingredients (DEET, picaridin, IR3535, OLE/PMD, 2-undecanone) and labelled protection times
  • Consumer Reports repellent tests — Lab and field mosquito tests of sprays and devices
  • Cochrane review of electronic repellents — Mosquito landings on bare skin with devices on versus off, from 10 field studies
  • Field trials (Iquitos, Peru; Mali 2026; Mérida, Mexico) — Infections, mosquito catches and indoor mosquito numbers with spatial repellents and screens
  • Freedonia market report — Which active ingredients lead US repellent sales

5Who ranked

The leading AIs, each building its own list of ten independently and naming a source for every place: Gemini, Claude, ChatGPT.

6How the places were set

The same entry written differently by different AIs was counted as one. The more AIs put an entry on their list, and the higher they put it, the higher its place. "AI agreement" shows how many of the AIs had it on their own list. Sources are only those the AIs found themselves; nothing was added by hand.

06Each AI's own list

🇺🇸 Gemini10 places · 1 notes

The same question, answered by Gemini alone. The final list above combines all the AIs.

  1. 1
    Picaridin 20% (Icaridin)

    Matches 30% DEET minute-for-minute across 8 to 14 hours without dissolving watch faces, sunglasses, or synthetic technical garments.

  2. 2
    DEET 25% to 30%

    The 70-year benchmark that shields against every biting species on Earth, though it softens plastic eyeglass frames and synthetic watchbands.

    Source ↗
  3. 3
    Permethrin 0.5% Clothing Treatment (Underused)

    The single most underused defense: kills mosquitoes upon contact with fabric and survives 6 machine washings without touching your skin.

    Source ↗
  4. 4
    Oil of Lemon Eucalyptus (OLE / PMD 30%)

    The sole botanical repellent backed by CDC testing that rivals DEET, delivering 6 hours of protection from refined Corymbia citriodora extract.

  5. 5
    Window and Door Screens (Underused Physical Barrier)

    A passive physical barrier providing 100% mechanical protection indoors that eliminates chemical exposure entirely.

    Source ↗
  6. 6
    Spatial Diffusers (Metofluthrin / Allethrin Vaporizers)

    Creates an invisible 15-foot defensive perimeter outdoors by vaporizing synthetic pyrethroids, cutting landing rates by 80% in still air.

  7. 7
    IR3535 (20%)

    A synthetic beta-alanine amino acid derivative favored throughout Europe for its soft skin feel and gentle pediatric profile.

  8. 8
    Ultra-High DEET (98% to 100%)

    Offers less than 60 minutes of additional protection over 30% DEET while dramatically increasing skin absorption and melted plastics.

  9. 9
    Citronella Candles & Torches

    A multi-million-dollar summer staple whose flickering flame and pleasant smoke reduce biting pressure by less than 15% in controlled tests.

    Source ↗
  10. 10
    Ultrasonic Repellers & Pest-Repelling Wristbands

    Ranks among the most lucrative pest gimmicks on global retail shelves despite a definitive Cochrane review proving zero effect on mosquito bites.

What Gemini noticed

Raw 'lemon eucalyptus essential oil' is not Oil of Lemon Eucalyptus (OLE): pure essential oils evaporate within 15 minutes, whereas EPA-registered OLE or synthetic PMD is chemically refined to concentrate para-menthane-3,8-diol for 6+ hours of proven shielding.

Source ↗
🇺🇸 Claude10 places · 3 notes

The same question, answered by Claude alone. The final list above combines all the AIs.

  1. 1
    20% picaridin spray

    EPA-registration figures put 20% picaridin at about 8-14 hours of protection, and it does not damage plastics the way high-strength DEET can.

    Source ↗
  2. 2
    DEET 20-30% spray

    Consumer Reports' top two sprays were 30% and similar-strength DEET products, and the best DEET range was 15-30%.

    Source ↗
  3. 3
    Oil of lemon eucalyptus (PMD) 30%

    The only plant-derived repellent the CDC and EPA guidance lists, but charts disagree: about 6 hours in one, about 2 hours in others.

  4. 4
    Spatial repellent emanators (transfluthrin) — underused

    In a cluster-randomised trial in Iquitos, Peru, a spatial repellent cut Aedes-borne virus infection by 34.1%, which is rare field evidence for a gadget.

    Source ↗
  5. 5
    IR3535 spray

    The fourth EPA-listed active ingredient: it is registered for mosquitoes, but I found no head-to-head numbers.

    Source ↗
  6. 6
    Plant-oil repellents (citronella, essential-oil sprays)

    Plant-based sprays generally performed poorly in Consumer Reports tests, and they are not evaluated by the EPA.

    Source ↗
  7. 7
    Citronella candles

    Popular on patios, but Consumer Reports found little evidence of solid protection.

    Source ↗
  8. 8
    Repellent wristbands

    The FTC fined one wristband maker, Viatek, for protection claims that lacked scientific support.

    Source ↗
  9. 9
    Ultrasonic repellers

    Cochrane found no significant difference in mosquito landings with the device on or off.

    Source ↗
  10. 10
    Very high-strength DEET (above about 30%)

    Strength beyond 30% adds hours of protection, but at the cost of the plastics-and-fabric damage you wanted to avoid.

What Claude noticed

Concentration matters differently by ingredient: for DEET the best range was 15-30%, while 5% picaridin performed poorly and 20% performed well.

Source ↗

Spatial repellents are among the few non-spray tools with a measured drop in infections (34.1% in Peru), yet the trial I found is a preprint and I could not confirm its later publication.

Source ↗

The Cochrane electronic-repeller review was closed in 2010 because the authors expected no new evidence to change its conclusion.

Source ↗
🇺🇸 ChatGPT10 places · 2 notes

The same question, answered by ChatGPT alone. The final list above combines all the AIs.

  1. 1
    EPA-registered DEET repellent

    DEET concentrations above about 50% add little mosquito protection time, while DEET can damage some synthetic materials.

    Source ↗
  2. 2
    20% picaridin repellent

    Picaridin is CDC-listed and is a practical alternative when you want effective skin protection without DEET’s material damage concern.

    Source ↗
  3. 3
    EPA-registered oil of lemon eucalyptus / PMD repellent

    CDC recommends formulated OLE/PMD products but says not to use them on children under 3.

    Source ↗
  4. 4
    IR3535 repellent

    It is one of CDC’s four familiar long-lasting active ingredients, but actual labeled protection varies by product.

    Source ↗
  5. 5
    Permethrin-treated clothing and gear

    Permethrin belongs on clothing and gear, never directly on skin.

    Source ↗
  6. 6
    Window and door screens

    Screens prevent mosquitoes from entering the home without requiring a fresh skin application; field studies also find reduced indoor mosquito populations.

    Source ↗
  7. 7
    Mosquito nets and bed nets

    A physical barrier offers protection during sleep, though its fit and correct use matter.

    Source ↗
  8. 8
    Transfluthrin spatial repellent devices

    In a 2026 field comparison in Mali, heat-activated devices cut trap counts sharply, but results depend on species, wind, placement, and setting.

    Source ↗
  9. 9
    Mosquito coils

    Coils can protect a circumscribed area, but evidence for preventing malaria infection remains uncertain.

    Source ↗
  10. 10
    2-undecanone repellent

    It appears in CDC’s list of EPA-registered ingredients, though it is less familiar than DEET or picaridin.

    Source ↗

What ChatGPT noticed

Screens are a durable prevention layer: CDC recommends repairing them, and a randomized trial in Mérida studied their effect on indoor Aedes abundance.

Source ↗

A new field comparison found strong trap-count reductions from heat-activated spatial devices, while citronella candles and an ultrasonic device had minimal or no measurable effect in that experiment.

Source ↗