We have more than our share of spiders too. I find them constantly in the corners of our rooms and, sorry to offend anyone, I smush them.
I researched this on-line and the only thing that came up (that wasn't toxic) were these pre-made triangle shaped boxes that had sticky tape inside to catch the spiders. You place them where the spiders like to go (wall and floor corners are probably best), the spiders get stuck and die.
I'm sure you could make some on your own. I'm going to make a few myself this weekend as I am tired of cleaning all the smudges on my walls ! I'm not sure what kind of tape I'll use yet.