The safest and easiest way to keep unwanted insects out of your home is to maintain your window and door screens, your window and door seals, and to fill other openings with caulking. Insects are attracted by food and water. Clean floors and cabinets thoroughly, and also around pipes, plumbing fixtures and garbage cans. Store your food in tightly-closed containers, and launder clothing before putting it away for extended periods. If you do find some bugs in the house, you can kill them with a surface or space spray, or a powdered insecticide.
Some insecticides offer residual effects, and are useful in breeding and feeding areas.
Read insecticide instructions carefully, and avoid contact with food or kitchen utensils and appliances. Do not smoke while applying insecticides and wash your hands and face throroughly afterwards. Avoid open flames, and do not touch treated surfaces until they are dry. Keep insect sprays away from children, pets and elderly, ill or pregnant persons. Check the label for an antidote before using any insecticide product.