While You Are At It, Keep Spiders Out 

You can even use WD-40 to keep spiders out of your buildings, like your shed or garage. Actually, spraying outside of your home can keep all kinds of pests out, but you need to be careful that you do not spray in risky areas.

Do not use this method inside, and do be extremely careful if you have little ones or pets running around. Try not to spray anywhere that they will be able to breathe the spray in or touch it, then put their hands in their mouths. Use caution.