Earwigs hate dry conditions, light, and open spaces without ground cover. They’re moisture-dependent insects that seek out damp, dark hiding spots during the day and feed at night, so the most effective deterrents work by removing the conditions they need to survive or by creating physical barriers they can’t cross.
Dry Conditions Are Their Biggest Enemy
Earwigs need moisture to survive. Their bodies lose water quickly through their thin exoskeletons, which means anything that dries out their environment makes it hostile territory. This is the single most effective principle behind earwig control: if you eliminate excess moisture around your home and garden, earwigs will move on to wetter ground.
In practice, that means watering your garden in the morning so the soil surface dries by evening, when earwigs become active. Fix leaky outdoor faucets and downspouts. Clear away leaf litter, dense ground cover, and piles of organic debris that trap moisture against the soil. Thick layers of mulch right against your home’s foundation are especially attractive to earwigs, so pull mulch back several inches from the base of exterior walls. Firewood stacked against the house is another common harbor.
Inside your home, reducing humidity in basements, crawl spaces, and bathrooms removes what drew them indoors in the first place. A dehumidifier in a damp basement can make the space far less appealing.
Diatomaceous Earth as a Physical Barrier
Diatomaceous earth is a fine powder made from fossilized algae that works by damaging the waxy coating on an earwig’s body. Once that protective layer is scratched or absorbed away, the insect loses moisture rapidly and dies from dehydration. It’s not a chemical poison. It’s a physical desiccant, which means earwigs can’t develop resistance to it the way they might with pesticides.
Sprinkle it around the base of plants earwigs are damaging, along foundation edges, and in cracks where they enter your home. The major limitation is that diatomaceous earth becomes ineffective once it gets wet, so you’ll need to reapply it after rain or watering. It’s safe around pets and children, but use the food-grade version rather than the type sold for pool filters, which is processed differently.
Light and Open Ground
Earwigs are strongly nocturnal and avoid light during the day. They’ll tuck themselves into any tight, dark crevice they can find: under boards, inside rolled newspapers, beneath potted plants, or in the folds of outdoor furniture cushions. Removing these daytime hiding spots forces them to relocate. If your garden beds have dense groundcover plants right next to vegetable rows, earwigs will shelter in the groundcover by day and feed on your vegetables at night.
You can actually use this behavior against them. Lay damp, rolled-up newspaper or short sections of garden hose in your beds in the evening. By morning, earwigs will have crawled inside to hide. Pick them up and shake the earwigs into a bucket of soapy water. This trapping method works because you’re offering exactly what they crave (dark, moist, tight spaces) in a location you control.
Oil and Soy Sauce Traps
One of the most effective homemade earwig traps uses vegetable oil and soy sauce. Punch small holes near the rim of a small plastic container, pour in some oil with a splash of soy sauce, snap the lid back on, and bury the container so the holes sit level with the soil surface. Earwigs are attracted to the oily, salty mixture, crawl through the holes, and drown in the oil.
Canola oil works well, and some gardeners add bacon grease or other animal fat since earwigs are drawn to greasy substances. Using a lidded container with a small entry hole has an added benefit: it catches earwigs selectively, because other insects aren’t attracted to the oil mixture. Empty and refill the traps every week or so for ongoing control.
Sealing Entry Points
Earwigs enter homes through gaps they find at ground level. They don’t bore through wood or damage structures, but they’ll exploit any existing crack, gap around pipes, or space beneath doors. Weatherstripping on exterior doors (especially sliding glass doors), caulk around utility penetrations, and tight-fitting door sweeps all help keep them out. Pay attention to basement windows and any point where siding meets the foundation, since these are common entry routes.
Outdoor lighting near doors attracts earwigs at night, not because they love light but because lights draw the smaller insects earwigs feed on. Switching to yellow or sodium vapor bulbs, which attract fewer insects overall, reduces the crowd of bugs near your entryways and gives earwigs less reason to congregate there.
Natural Predators That Keep Populations Down
Toads and ground-dwelling birds are effective earwig predators in garden settings. If you keep backyard poultry, chickens and ducks will consume large numbers of earwigs while foraging. Encouraging toads by providing a shady, damp shelter (like an overturned clay pot with a chipped entrance) in a corner of your garden gives you a resident predator that feeds heavily on earwigs and other ground-level pests at night.
Ground beetles, another common garden inhabitant, also prey on earwigs. Avoiding broad-spectrum insecticide sprays helps preserve these natural predator populations, which often do more long-term good than the sprays themselves.
What About Essential Oils and Vinegar?
You’ll find plenty of recommendations for peppermint oil, eucalyptus, citrus sprays, and vinegar as earwig repellents. These substances may irritate earwigs on direct contact, but their effectiveness as area repellents is limited and short-lived. Essential oils evaporate quickly outdoors, meaning any deterrent effect disappears within hours. Vinegar sprayed directly on an earwig can kill it (the acetic acid is corrosive to soft-bodied insects), but it won’t create a lasting barrier.
If you want to try essential oils as part of a broader strategy, mix a few drops of peppermint or neem oil with water in a spray bottle and apply it around doorframes and window wells. Just know that you’ll need to reapply frequently, and this alone won’t solve an established earwig problem. The habitat modifications described above, reducing moisture, removing hiding spots, and sealing entry points, are far more reliable than any spray-on repellent.