Keeping bugs away comes down to a layered approach: protecting your skin, treating your clothing, sealing your home, and eliminating the conditions that attract pests in the first place. No single method handles everything, but combining a few targeted strategies dramatically cuts your exposure to mosquitoes, ticks, bed bugs, and household pests like ants and cockroaches.
Choosing the Right Repellent
Four active ingredients are registered with the EPA for skin-applied insect repellents: DEET, picaridin, IR3535, and oil of lemon eucalyptus (sometimes listed as PMD on product labels). All four work, but concentration matters more than brand. Products with less than 10% of any active ingredient typically protect for only one to two hours. The CDC recommends DEET concentrations of 20% or higher for meaningful protection, though anything above 50% adds no extra benefit.
For children, the American Academy of Pediatrics recommends capping DEET concentration at 30%. Oil of lemon eucalyptus should not be used on children under three because it hasn’t been tested in that age group. It’s also worth knowing that oil of lemon eucalyptus (the refined compound PMD) is not the same thing as natural lemon eucalyptus essential oil, which has not been approved as an effective repellent.
Plant-Based Repellents
Citronella, geranium, peppermint, lavender, and similar plant-oil blends offer modest protection, typically repelling mosquitoes for about two hours at best. Oil of lemon eucalyptus is the exception: it performs similarly to 15%–20% DEET in testing. If you want a plant-derived option that actually holds up, PMD-based products are the only ones with strong evidence behind them.
Treating Clothing With Permethrin
Permethrin is a synthetic insecticide you apply to fabric, not skin. It kills or repels mosquitoes, ticks, and other biting insects on contact with treated clothing, and it’s one of the most effective layers of protection available. You can buy pre-treated clothing or spray your own gear with a 0.5% permethrin solution.
The performance gap between the two methods is significant. Factory-treated garments remain effective for up to 70 washes. DIY spray treatments last about six washes. Either way, spray only outdoors in a ventilated area, never apply directly to skin, and let clothing dry completely before wearing.
Permethrin is safe for adults, children, dogs, and pregnant people when used as directed. The amount absorbed through skin falls well below safety thresholds, and mild skin irritation is rare. One critical exception: permethrin is toxic to cats when wet. Let all treated clothing dry fully before allowing any contact with cats. Products containing high concentrations (45%–65%) can cause tremors, seizures, and death in cats exposed accidentally.
Tick-Specific Strategies
Ticks require their own prevention checklist because they behave differently from flying insects. They don’t buzz around you; they wait in tall grass and leaf litter, then latch on as you brush past. Stay on the center of trails when hiking, and avoid areas with high grass when possible.
The repellent combination that works best against ticks is DEET (20% or higher) on exposed skin plus permethrin-treated clothing on pants, socks, and boots. After coming indoors, shower within two hours to wash off any ticks that haven’t attached yet. Do a full-body check with a mirror, paying close attention to the armpits, behind the ears, the belly button, behind the knees, between the legs, the waistline, and scalp.
Don’t forget your gear. Ticks ride into homes on clothing, backpacks, and pets. Tumble dry clothes on high heat for 10 minutes to kill ticks. If clothes need washing first, use hot water. Cold and medium temperatures won’t kill them. If you can’t wash in hot water, tumble dry on low heat for 90 minutes or high heat for 60 minutes. Treat dogs with tick collars, topical medications, or prescribed preventatives, since dogs are highly susceptible to tick-borne diseases and easily carry ticks indoors.
Sealing Your Home Against Pests
Insects and rodents enter through surprisingly small gaps. Mice squeeze through openings as small as a quarter inch. Rats need only half an inch. A thorough inspection of your home’s exterior, especially the foundation, utility penetrations, and joints between the foundation and above-grade walls, reveals the entry points that matter most.
The right sealing material depends on the size of the gap:
- Quarter-inch or smaller: Non-elastomeric caulk
- Larger gaps with movement: Elastomeric sealant (look for products meeting ASTM C-920)
- Hairline cracks: Liquid sealer
- Utility penetrations: Expanding foam for small gaps, copper or stainless steel mesh stuffed into larger holes and covered with a hardening compound or metal plate
Copper mesh is preferable to steel wool because it doesn’t rust. For rodent-prone areas, add copper or stainless steel mesh inside expanding foam, since rodents can chew through foam alone. Around plumbing and wiring, seal cracks and cover with metal flashing. Inside the home, caulk moldings, joints, and trim around floor perimeters, doors, cabinets, and windows with silicone sealant to eliminate the crevices where bed bugs and cockroaches hide.
Controlling Moisture and Sanitation Indoors
Many household pests, including cockroaches, silverfish, and certain ants, are drawn to moisture before they’re drawn to food. The EPA recommends keeping indoor humidity between 30% and 50%, and no higher than 60%. A basic hygrometer (under $15 at most hardware stores) tells you where you stand. If readings are high, a dehumidifier in the basement or crawl space makes an immediate difference.
Check for leaky pipes under sinks, sweating cold-water pipes in warm rooms, cracked connections in walls, and overflowing drip pans behind refrigerators. These hidden water sources sustain pest colonies that no amount of surface cleaning will eliminate. In dirt-floor basements and crawl spaces, install ventilation (active or passive) and lay down a vapor barrier to reduce ground moisture. Moisture-locking paint on porous foundation materials like concrete block also helps.
Outside, maintain a three-to-six-foot gap between landscaping and your home’s exterior. Avoid letting mulch sit directly against the foundation. A vegetation-free zone of 18 to 36 inches of crushed stone around the perimeter removes cover for insects trying to reach the structure. Make sure the ground slopes away from the foundation so water drains outward, not toward your walls.
Eliminating Mosquito Breeding Sites
Mosquitoes lay eggs in standing water, and the larvae develop in that same water before emerging as biting adults. Eliminating standing water around your property is the single most effective yard-level mosquito control. Flip over flower pot saucers, clear clogged gutters, empty birdbaths weekly, and check for water pooling in tarps, tires, and toys.
For water you can’t dump, like rain barrels or ornamental ponds, larvicide products containing Bti (a naturally occurring soil bacterium) kill mosquito larvae without harming fish, birds, pets, or other wildlife. Bti produces a protein that’s toxic only to mosquito and black fly larvae, and only when ingested. It has no effect on organisms lacking the specific gut chemistry to activate it. Drop-in Bti dunks or granules are widely available at garden centers. Keep in mind that Bti works on actively feeding larvae. Once larvae reach their final stage before becoming pupae, they stop feeding and larvicides become less effective, so treat water sources early and regularly.
Preventing Bed Bugs While Traveling
Bed bugs don’t come from poor hygiene. They hitchhike on luggage and clothing, and even high-end hotels can harbor them. A quick inspection when you check in saves you weeks of headaches at home.
When you enter a hotel room, leave your luggage on the luggage rack, a hard table, or in the bathtub. Never place bags or coats on the bed. Then inspect: pull back the sheets and check mattress seams, especially the corners, for small brownish or reddish spots (fecal stains). Look behind the headboard, inside the cracks of bedside furniture, along the carpet edge near the bed, and around the baseboards. A phone flashlight works, but a small LED flashlight is better for seeing into seams and crevices. If you find signs, report it to the front desk and request a different room.
When you get home, inspect luggage seams and clothing before bringing anything inside. Wash all travel clothes immediately in hot water and dry on high heat. If luggage shows signs of bugs, don’t bring it indoors. Heat treatment (sustained exposure above 120°F) kills bed bugs at all life stages, so a hot dryer cycle is your most reliable tool for clothing and fabric items.