It is believed to be only about a fourth of the total species in the world. Even though spiders are considered beneficial because they eat flies, crickets and other insects, they are a nuisance in a house. Regular and thorough house-cleaning is one of the most effective ways to eliminate spiders and discourage their return, say Dr. Faith Oi, Extension entomologist with the Alabama Cooperative Extension System. A vacuum cleaner or broom is effective for removing spiders, their webs and egg sacs. Also, installing tight-fitting screens and door sweeps will help keep spiders and other insects out of the house.
Spiders prefer quiet undisturbed areas.
Reducing clutter in closets, garages, utility rooms, basements and attics will make these areas less attractive to spiders. Spiders are shy by nature. They don't bite unless held, squeezed or accidentally trapped. Wearing work gloves when inspecting box interiors or moving stored items may help homeowners avoid being bitten. Large numbers of spiders are located outdoors around the perimeter of structures.