Which smell do bed bugs hate?

Bed bugs have a strong sense of smell and are repelled by certain strong, pungent odors that irritate them, though smell alone will not eliminate infestation because they will tolerate unpleasant smells if hungry and host is nearby. Smells bed bugs hate most include strong essential oils like peppermint oil, lavender oil, tea tree oil, eucalyptus oil, and neem oil, which have some repellent effect and may disrupt their ability to find hosts, though research shows limited residual effectiveness. They dislike the smell of strong spices like cayenne pepper, cinnamon, and black pepper, and strong chemical odors like rubbing alcohol, bleach, and ammonia, though these are not recommended for use on beds due to toxicity and flammability. Desiccant dusts like CimeXa have no smell but kill by dehydrating. Some people use dryer sheets with linalool, but effectiveness is minimal. While these smells may cause temporary avoidance, bed bugs quickly habituate if highly motivated by hunger and will cross repellent barriers to feed. Pest control experts consider scent repellents as minor supplemental measures, not primary control. The most effective way to prevent and kill bed bugs is not smell but physical and heat methods such as encasing mattress and box spring in bed bug proof encasements, using interceptor traps under bed legs, washing bedding weekly on high heat, vacuuming mattress seams regularly, and professional heat treatment heating rooms to 120 to 135 degrees Fahrenheit that kills 100 percent of bugs and eggs.