Apply gel bait in the crevices and cracks of your kitchen drawers, and along upper shelving and baseboards. If you have children or pets, then make sure to apply the gel in areas that are out of their reach.
Place bait stations behind the refrigerator, microwave, oven, toasters, toilet, and other major appliances in your kitchen and bathroom. Also place them underneath your dishwasher, refrigerator, oven, washer, dryer, and hot water heater. Identify high traffic areas by looking for roach droppings. Roach droppings resemble ground black pepper.
Place sticky traps in the same areas you place bait stations. Do not spray sticky traps and bait stations with insecticides or cleaning products. These will contaminate the baits. If the bait is contaminated, then the roaches will not enter. [4] X Research source
Do not use a spoon to apply the boric acid. You can purchase the acid from your local hardware store. Do not apply the acid on countertops, especially where food is prepared.
Since roaches tend to live in between walls, this is an effective way to kill them.
Try not to leave dirty dishes and food in the sink overnight. Empty the trash every night and cover the trashcan with a tight fitting lid.
You can purchase expanding foams from your local hardware store.
