To prevent an onslaught of pests from occupying your house as the weather cools, simply  follow the National Pest Management Association guidance presented in this post from Bob Villa. Seal cracks in the exterior envelope, especially where utility pipes enter, with silicone caulking.  Fill larger gaps inside your home with steel wool. Pests avoid the roughness of the steel fibers and rodents cannot gnaw through it. Repair ripped window screens, door sweeps and loose mortar in the basement foundation, screen dryer vents and chimneys and replace weather stripping to seal these ideal entry points. If you suspect an infestation, hire a licensed pest control professional to assess the situation. To read more click here.