Pest control folklore gets passed from neighbor to neighbor, shared on social media, and repeated on home improvement shows — and most of it is wrong. These myths don't just waste money on ineffective solutions. They sometimes make pest problems worse by delaying effective treatment or creating false confidence.
Reality: Mice prefer high-calorie, high-fat foods. Peanut butter outperforms cheese dramatically because it's sticky (mice can't grab it and run), aromatic (attracts from a distance), and calorie-dense. Chocolate, hazelnut spread, and even Slim Jim pieces work well. Cheese dries out and loses its attractiveness quickly.
Reality: This myth has been thoroughly debunked. Cellar spiders (the actual "daddy long-legs spider") do have venom, but it's not particularly potent. Their fangs can pierce human skin, but the venom produces no significant effect. The entire premise — "most venomous but can't bite you" — is false on both counts.
Reality: Cleanliness helps reduce food sources for cockroaches and ants, but many pests enter homes regardless of sanitation. Bed bugs are attracted to body heat and CO₂ — not dirt. Stink bugs, cluster flies, and Asian lady beetles enter based on building orientation and gap size. Mice enter seeking warmth. Spiders follow prey insects. A clean home with unsealed gaps will still get pests.
Reality: No peer-reviewed study has demonstrated significant repellent effect from dryer sheets against any pest. The linalool in some dryer sheet brands has very mild insect-repelling properties at concentrations far higher than a sheet provides. For mosquitoes, use DEET, picaridin, or OLE. For mice, use exclusion and traps.
Reality: It depends on the species. One American cockroach (palmetto bug) in your bathroom may literally be a single roach that wandered in from the sewer — it's an outdoor species. One German cockroach in your kitchen is a different story — German cockroaches are exclusively indoor breeders, and seeing one during the day suggests a significant population hidden in cracks and appliances.
Reality: Subterranean termites can enter slab homes through cracks as narrow as 1/32 inch — expansion joints, plumbing penetrations, and settling cracks in the slab. Slab construction is not termite-proof. In fact, slab homes can be harder to inspect because there's no crawl space to check for mud tubes.
Reality: Mosquitoes breed in any standing water — including bottle caps, plant saucers, clogged gutters, birdbaths, kids' toys, and the corrugated folds of a tarp. Asian tiger mosquitoes specialize in small container breeding and are the dominant urban mosquito species. Eliminating standing water within 200 feet of your home is more effective than any spray.
Reality: Fresh cedar oil does repel clothes moths to some degree — but the oil concentration fades within 2–3 years, after which the cedar provides zero protection. Cedar has never been shown to kill moth larvae that are already feeding on fabric. Proper moth prevention requires sealed storage, cleaning before storage, and pheromone traps for monitoring.
Reality: Banana peels rot and attract fruit flies. Coffee grounds have shown mild, temporary deterrent effect in some studies but provide no lasting barrier. Ants walk around or over both within hours. Use bait stations to eliminate the colony rather than trying to redirect individual workers.
Reality: The vast majority of house spiders — cellar spiders, common house spiders, jumping spiders, wolf spiders — are harmless predators that reduce populations of actual pest insects. Only two U.S. spiders are medically significant: black widows and brown recluses. If you can identify those two, everything else in your house is free pest control.