By Paul Muresan | Tougher Than Tom | Updated: July 2026
Quick Answer
The mosquito repellents that actually work are the ones registered with the EPA for skin: DEET, picaridin (icaridin), IR3535, oil of lemon eucalyptus (OLE/PMD), and 2-undecanone. Every one of these is backed by the CDC as effective against mosquito bites — the differences are about how long they last, how they feel, and who can use them, not whether they work. DEET and picaridin give the longest, most reliable protection; OLE is the strongest plant-based option (but not for children under three). What does not reliably work: citronella candles, ultrasonic apps, wearable wristbands, vitamin B1, and "repellent plants" sitting in a pot. And here's the part most guides skip: a skin repellent only protects you, for a few hours. It does nothing about the mosquito population breeding in your yard. To actually cut bites long-term you pair a good repellent with area control — removing standing water and trapping the biting females.
Why we wrote this (and why "best" is the wrong question)
We're Tougher Than Tom. We've spent years helping people get mosquitoes out of their homes and yards, and the single most common mistake we see is treating "mosquito repellent" as one thing. It isn't. "Repellent" covers everything from a lab-tested spray the military uses to a scented candle that mostly makes your patio smell nice. Lumping them together is exactly why people buy something, get bitten anyway, and conclude that "nothing works."
So instead of crowning a single "best" product, this guide sorts repellents into what the evidence actually supports, matches each one to a real-life scenario, and — because we sell area-control gear ourselves and want to be straight with you about it — explains where a skin repellent stops being enough. By the end you'll know what to put on your skin, what to skip, and what to do about the mosquitoes that are still breeding twenty feet from your back door.
The repellents that actually work (EPA-registered actives)
The U.S. Environmental Protection Agency reviews skin-applied repellents for safety and effectiveness, and the CDC recommends products containing one of a short list of active ingredients. If the label names one of these, it works — the question is just which one fits your situation.
DEET — the benchmark
DEET has been the reference point since the 1950s and remains the most-studied repellent in the world. It works against mosquitoes and ticks, and higher concentrations don't repel "harder" — they last longer. A low-percentage formula is fine for a short evening walk; a higher one is better for a long day outdoors. The trade-offs are the greasy feel, the smell, and the fact that it can damage some plastics and synthetic fabrics.
Picaridin (icaridin) — the modern all-rounder
Picaridin offers protection comparable to DEET but is nearly odorless, feels lighter on skin, and won't melt your sunglasses or watch strap. For most people looking for one everyday repellent, this is the easiest to live with.
IR3535 — the gentle option
IR3535 has been used in Europe for decades and is known for being skin-friendly, which makes it a common pick for families. Protection time is typically shorter than DEET or picaridin, so plan to reapply more often.
Oil of lemon eucalyptus (OLE) and PMD — the plant-based one that's real
This is the one "natural" repellent the CDC actually lists alongside the synthetics. OLE (and its refined component PMD) is derived from the lemon eucalyptus tree and gives a few hours of solid protection. Two caveats: the CDC advises against using OLE/PMD on children under three, and "pure" lemon eucalyptus essential oil is not the same tested product — you want a registered OLE repellent.
2-undecanone — the newer plant-derived active
Originally identified in wild tomato plants, 2-undecanone is a more recent EPA-registered active. It's less common on shelves but a legitimate option if you're after a plant-derived ingredient with regulatory backing.
Permethrin — for gear, not skin
Permethrin deserves a mention with an asterisk: you treat clothing, shoes, and gear with it, never your skin. Combined with a skin repellent it's a favorite of hikers and anyone spending long days in heavy-mosquito country.
At a glance: how the working repellents compare
| Active ingredient | Protection duration | Feel / odor | Best for | Watch-outs |
|---|---|---|---|---|
| DEET | Long (rises with concentration) | Greasy, noticeable smell | Long days out, travel, high-mosquito areas | Can damage plastics/synthetics |
| Picaridin | Long | Light, near-odorless | Everyday all-rounder | Very few; great default |
| IR3535 | Moderate | Mild | Families, sensitive skin | Reapply more often |
| Oil of lemon eucalyptus / PMD | Moderate (a few hours) | Herbal scent | People wanting a plant-based, CDC-listed option | Not for kids under 3 |
| 2-undecanone | Moderate | Mild | Plant-derived preference | Harder to find |
| Permethrin | Days (survives washes) | Odorless once dry | Treating clothing & gear | Clothing only — never on skin |
What doesn't reliably work (and why people keep buying it)
Plenty of "repellents" sell well because they're pleasant, cheap, or promise a chemical-free fix. The problem is the evidence. Mosquitoes hunt using the carbon dioxide you exhale, your body heat, and your skin odor — and most gadget-style repellents don't meaningfully interrupt any of that.
- Citronella candles — the oil is a genuine repellent, but a candle releases far too little of it, protects only a tiny radius, and the faintest breeze scatters the plume. We dug into this in Do citronella candles actually repel mosquitoes?
- Wristbands and ultrasonic apps — bands only protect the few inches of skin nearest the band, and the science on sound-based repellers is clear that they don't reduce bites. See Do mosquito repellent bracelets and ultrasonic apps work?
- Bug zappers — they kill thousands of insects, but studies find almost none of them are biting mosquitoes. More in Do bug zappers work on mosquitoes?
- "Repellent plants" in a pot — lavender, basil and catnip contain useful oils, but the oils are locked in the leaves; a plant sitting in soil barely moves the needle unless you crush the leaves onto your skin. See plants that repel mosquitoes.
- Vitamin B1 and garlic pills — a persistent myth with no reliable evidence behind it.
None of this means the underlying ingredients are useless — it means the delivery method is weak. A crushed-leaf rub or a proper OLE spray is a different story than an unlit citronella bucket on a windy deck.
The TTT Repellent Match: pick by scenario, not by hype
Because the "best" repellent depends entirely on what you're doing, here's the framework we actually use when people ask us. Match the row to your situation.
| Your scenario | What we'd reach for | Why |
|---|---|---|
| Quick evening on the porch | Picaridin spray | Fast, light, no smell for a short exposure |
| Full day hiking or fishing | Higher-% DEET or picaridin + permethrin-treated clothes | Maximum duration; clothing layer covers what you miss |
| Kids in the backyard | IR3535 or picaridin (OLE only if 3+) | Gentle actives suited to frequent reapplication |
| Want a plant-based product | Registered oil of lemon eucalyptus (OLE/PMD) | The one botanical option with CDC backing |
| Travel to a high-risk region | DEET, plus permethrin on gear | Broadest, longest, best-documented protection |
| Your own yard, every night all summer | Repellent for tonight + area control for the season | Repellent protects you for hours; only area control lowers the population — see below |
The honest limit of any repellent: it only protects you, for a few hours
Here's what the label won't tell you. Even the best spray is a personal shield with a timer. Put it on, and mosquitoes leave your skin alone until it wears off. But the mosquitoes are still there — breeding, biting everyone who forgot to spray, and waiting for you to reapply late. If you're fighting the same backyard night after night, a repellent is a patch, not a fix.
To actually reduce how many mosquitoes are around your home, you have to go after the population itself, and that comes down to two things every entomology source agrees on:
- Remove standing water. Mosquitoes breed in surprisingly small amounts of it — a saucer under a plant pot, a clogged gutter, a forgotten bucket. Empty and scrub anything that holds water weekly. Our full walkthrough is in How do I mosquito-proof my yard?
- Trap the biting females. The mosquitoes that bite are females hunting for a blood meal. Catching them with a CO₂-based trap that mimics a human target steadily lowers the local population instead of just hiding you from it.
We'll be upfront: this is where our own product comes in. Mosquito TNT is our CO₂-style trap built for exactly this — pulling in and capturing the host-seeking females so there are fewer of them to bite you in the first place. We're obviously biased, but the principle isn't ours — "protect your skin and attack the breeding population" is the standard integrated approach, and you can read what real buyers say on our reviews page. Use the repellent for tonight; use area control so next week is quieter.
How to apply repellent so it actually protects you
Even a great repellent fails if you use it wrong. The mistakes we see most:
- Too little, too thin. Repellent works by covering skin evenly. Patchy application leaves landing strips.
- Sunscreen order. Sunscreen first, let it absorb, then repellent on top — never the reverse.
- Missing the ankles and neck. Mosquitoes love the spots people skip. Get ankles, wrists, the back of the neck, and behind the ears.
- Not reapplying. Protection has a clock. When you start noticing mosquitoes again, it's time — don't wait for the first bite.
- Spraying near food or into wind. Spray onto hands and wipe onto the face; keep it away from cuts, eyes, and the dinner table.
If you'd rather lean on non-spray tactics indoors, we cover those in getting rid of mosquitoes in your room at night and how to get rid of mosquitoes without chemicals.
What about the DIY and "natural" route?
DIY repellents are popular and some have a kernel of truth. Vinegar genuinely irritates mosquitoes (we explain the chemistry in why mosquitoes hate vinegar), and there are legitimate low-chemical tactics in our natural home remedies guide and how to naturally repel mosquitoes. But be realistic: a homemade spray won't match a registered OLE product for duration, and a DIY killer spray is a spot solution, not a personal shield. Natural approaches shine as part of a layered plan — repellent on skin, fewer breeding sites, active trapping — not as a single silver bullet. Even wardrobe helps a little: mosquitoes are drawn to dark colors, as we cover in what colors mosquitoes hate.
Frequently Asked Questions
What is the most effective mosquito repellent?
For sheer duration and reliability, DEET and picaridin are the two most effective skin repellents, both recommended by the CDC and registered with the EPA. DEET is the most-studied repellent in the world and its protection time increases with concentration; picaridin offers comparable protection while being nearly odorless and easier on skin, plastics and fabrics. If you want a single everyday product and don't have a specific reason to choose DEET, picaridin is the easiest all-rounder. For the longest protection in heavy-mosquito conditions, pair either one with permethrin-treated clothing. "Most effective" also depends on use — the best repellent is the one you'll actually apply properly and reapply on schedule.
What is the best natural mosquito repellent that actually works?
The only plant-based repellent the CDC lists alongside the synthetics is oil of lemon eucalyptus (OLE) and its refined component PMD. A registered OLE product gives a few hours of genuine protection, which is far more than a citronella candle or a "repellent plant." Two important caveats: the CDC advises against OLE/PMD on children under three, and a bottle of pure lemon eucalyptus essential oil is not the same as a tested, registered OLE repellent — check the label for the active ingredient. Other botanicals like 2-undecanone (from wild tomato) are also EPA-registered. Beyond skin, natural yard tactics — removing standing water and reducing shade and clutter — do real work against the population.
Do mosquito repellent bracelets, candles, and ultrasonic apps work?
Not reliably. Wristbands only protect the small area of skin right next to the band, leaving the rest of you exposed. Ultrasonic apps and plug-in devices have been studied repeatedly and don't reduce mosquito bites. Citronella candles use a real repellent oil but release too little of it, protect only a small radius, and are easily defeated by a breeze. These products aren't scams exactly — the ingredients or ideas have some basis — but the delivery is too weak to protect you the way a properly applied skin repellent does. If you want the detail, we test each of these in dedicated articles on bracelets, candles and bug zappers.
How often do I need to reapply mosquito repellent?
It depends on the active ingredient and its concentration, plus how much you're sweating, swimming, or wiping. Higher-concentration DEET and picaridin last the longest; IR3535 and OLE generally need more frequent reapplication. The practical rule: reapply when you start noticing mosquitoes around you again, and always after swimming or heavy sweating — don't wait for the first bite, because that means the protection has already lapsed. Follow the specific product label, since that reflects the tested duration for that formula.
Is DEET safe to use?
Used as directed, DEET has a long safety record and is recommended by the CDC for protection against mosquito- and tick-borne disease. Apply it to exposed skin and clothing (not under clothes), avoid cuts and eyes, use only enough to cover exposed skin, and wash it off when you come indoors. For children, follow the age guidance on the label. If you'd still rather avoid it, picaridin offers similar protection with a lighter feel, and OLE is a plant-based alternative for anyone three and older. As with any product, follow the label — that's where the tested, approved use lives.
Why do I still get bitten even when I wear repellent?
Usually it's application or timing, not the product. Patchy coverage leaves "landing strips" of untreated skin — commonly ankles, wrists and the back of the neck. Repellent worn under sunscreen, or applied before sunscreen absorbs, can be compromised. And every repellent wears off, so bites late in the evening often mean you're overdue for a reapplication. There's also the bigger picture: if your yard is a mosquito nursery, you're facing a constant supply of new biters, and no amount of spray fixes the source. That's why we recommend pairing a repellent with removing standing water and trapping the biting females.
Does a repellent reduce the number of mosquitoes in my yard?
No — and this is the most important thing to understand. A skin repellent makes you unappealing for a few hours; it does nothing to the mosquito population living and breeding around your home. To actually lower the numbers you have to attack the source: eliminate standing water where they breed, and trap the host-seeking females before they bite. That's the job of area control — for example a CO₂-based trap like our Mosquito TNT — used alongside, not instead of, a good repellent. Repellent handles tonight; area control makes next week quieter.
The bottom line
Skip the gadgets and choose a repellent with a real, EPA-registered active ingredient — picaridin for an easy everyday choice, DEET for maximum duration, OLE if you want a plant-based option that's actually tested. Apply it properly and reapply on schedule. Then remember what a repellent can't do: it protects you, not your yard. If you're tired of fighting the same mosquitoes every night, pair your spray with area control — clear the standing water and trap the biting females with something like Mosquito TNT. Protect your skin for tonight; shrink the population for the rest of the season.