Spiders can have household benefits. Even the Violin Spider will eat cockroaches, silverfish and soft bodied insects. Cobweb spinning Cellar Spiders will eat Black Widow Spiders. Yet they are creatures that you wouldn't want to keep in Keep in your house. Don't let leaves or wood accumulate near your house as they are favorite hiding places. Clean corners and dark areas of the house as well, as spiders will build webs in corners and dark areas of the house. Clean up trash, less trash inside or outside the house will mean less spiders. Look for the entrance areas, are they coming in through cracks, crevices or open areas to the outside, if so seal them tightly. Eliminate food sources; spiders need other insects to survive so eliminate any other insects from the house.