7 Mosquito Fighters That Actually Work — and 5 That Just Waste Your Money

I live in South Florida, where the whole point of being here is being outside. Warm nights, the patio, dinner in the backyard. Until the mosquitoes show up and wreck all of it.

So over the years I’ve tried just about everything that promises to fight back. Here’s what I learned the expensive way: A lot of what people pay for does absolutely nothing.

The good news? A handful of cheap — and a couple of not-so-cheap things — actually work. Here’s how to tell them apart.

7 mosquito fighters that actually work

1. A repellent with the right active ingredient. This is your front line. The Centers for Disease Control and Prevention (CDC) says to use an Environmental Protection Agency (EPA)-registered repellent with DEET, picaridin, oil of lemon eucalyptus, or IR3535. “Registered” means it’s been tested and it actually works.

2. Dumping standing water. Mosquitoes lay their eggs in still water, and they don’t need much — a bottle cap’s worth will do. Walk your yard once a week and empty anything holding water: buckets, plant saucers, toys, clogged gutters, the dog bowl.

3. Mosquito dunks for the water you can’t dump. Got a rain barrel, pond, or a low spot that stays wet? Drop in a Bti dunk. The EPA says this natural bacteria kills mosquito larvae but leaves people, pets, and bees alone.

4. A plain fan. Sounds too dumb to work, but it does. Mosquitoes are weak fliers, so a stiff breeze on the porch grounds them — a fix the American Mosquito Control Association actually endorses. It’s also the move on windy nights, when air-based repellers struggle. Here’s a pedestal fan for around $40.

5. Long, loose clothing. They can’t bite what they can’t reach. Lightweight long sleeves and pants help, and the CDC says you can go further by treating clothes with permethrin, which repels and kills bugs through several washes.

6. Window and door screens. Boring, cheap, effective. Keeping mosquitoes out of the house is half the fight, especially at night. Patch any holes and make sure your screens actually seal.

7. A spatial repeller like the Thermacell. Here’s the exception to the gadget rule. I bought a Thermacell E-ZoneGuard not long ago, and unlike the junk on the next list, it’s backed by real research. It gently heats a pyrethroid (a synthetic insecticide) into the air to build a repellent zone around you. One catch: It needs calm air. A strong breeze scatters the zone, so it’s a still-night tool, not a windy-porch one.

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5 mosquito ‘fixes’ that just waste your money

1. Bug zappers. That satisfying zap? It’s mostly harmless bugs frying — moths, beetles, the stuff birds eat. Mosquitoes are a tiny sliver of the kill, which is why scientists keep calling them a waste of money. And they cost $30 to $200 for the privilege.

2. Citronella candles. They smell nice. That’s about it. Research, including a New Mexico State University study in the Journal of Insect Science, found citronella candles didn’t meaningfully cut bites. You’d have to sit directly in the smoke to get any benefit.

3. Ultrasonic gadgets and phone apps. These claim to drive mosquitoes off with a sound you can’t hear. The American Mosquito Control Association says at least 10 studies over 15 years found these devices have zero repellent effect. The Federal Trade Commission (FTC) has gone after makers for false claims.

4. Repellent wristbands and bracelets. The pitch is a force field of bug-repelling oils around your wrist. In reality, mosquitoes just bite everywhere the band isn’t. Consumer Reports testers got bitten immediately, and the FTC has fined a wristband maker for bogus claims.

5. Eating garlic (or any diet trick). No food makes you bite-proof. There’s no such thing as an EPA-registered garlic repellent, and studies haven’t backed garlic, vitamin B, or any other “eat this” fix. Save it for the pasta.

Here’s the bottom line. Most of what works is cheap, boring, and already at your hardware store: a good repellent, a fan, some screens, and five minutes spent dumping standing water. Add a spatial repeller for still nights, and you’re set.

The stuff that doesn’t work is flashy, heavily marketed, and built to look high-tech. Spend your money on the stuff that earns it. Your skin — and your wallet — will thank you.