I am the person mosquitoes love. If there is one mosquito at a barbecue and ten other people, it finds me. I have left outdoor gatherings with twenty bites while the person next to me had zero. I have tried citronella candles, those wristbands, the smartphone apps that claim to emit ultrasonic frequencies. None of them worked.

So I went down a research rabbit hole. What actually repels mosquitoes and what is just marketing? Here is what the science says and what I have tested on myself — the world’s most attractive mosquito target.

What Actually Works

DEET and picaridin are the gold standard. They work. They work for hours. If you are going somewhere with serious mosquito-borne disease risk, use DEET. This article is about natural alternatives for everyday backyard situations, but I want to be honest up front: the natural stuff works less well and for less time.

That said, here is what has actually reduced my bite count without synthetic chemicals:

Oil of Lemon Eucalyptus (OLE)

This is the only natural repellent that performed as well as low-concentration DEET in CDC testing. Not lemon eucalyptus essential oil — that is a different product. OLE is a refined extract. Look for it as an active ingredient on the label. Repel and Coleman both make versions. I get about four hours of protection out of it.

Fans

Mosquitoes are weak fliers. A box fan or oscillating fan on your patio cuts mosquito landings by up to sixty-five percent, according to actual studies. They cannot fly against a breeze stronger than about two miles per hour. A fan creates a bubble of moving air they cannot penetrate. This costs pennies in electricity and works immediately. It is my favorite mosquito hack because it involves zero chemicals.

What Does Not Work (Save Your Money)

• Citronella candles — The wind blows the scent away. In lab conditions with no wind, they offer about forty percent reduction. In real life with a breeze, they are decoration.
• Ultrasonic devices — Multiple studies show zero effect. None. Mosquitoes do not care about sound waves.
• Wristbands — They only protect the wrist. The mosquito just bites your ankle instead.
• Garlic or vitamin B supplements — No evidence they change your scent enough to repel mosquitoes.

Environmental Controls

Standing water is where mosquitoes breed. Walk your yard after a rain. Dump anything holding water: flower pot saucers, clogged gutters, kids’ toys, the tarp over the woodpile. A mosquito can breed in a bottle cap full of water. Eliminating standing water within a hundred feet of your sitting area reduces the local population more than any repellent.

Also: mosquitoes are most active at dawn and dusk. If you are especially attractive to them like I am, go inside for that half-hour window. Or sit directly in front of the fan.