Spiders are one of the most feared home invaders. There are more phobias about spiders than any other pest, and understandably so. If you get bitten by the wrong spider - a black widow or a brown recluse - and you have a bad reaction to the venom, you can end up in the hospital. And yes, there have even been some deaths associated with spiders
In order to control spiders, there are several things that are important to know. Don't expect perfection in spider control; they are biologically not very receptive to chemical agents and not very cooperative in picking up pesticides. So just spraying alone is not a great defense against spiders. As you know, spiders are built high off the ground.