Where I used to live we had cockroaches and it got to a point where our kitchen was never safe. We moved right after our contract was up mainly because of this into a really nice conclave of garden homes. At first there were still some pesky roaches aloof. We noticed however that they weren't alone because there were spiders too. We stomped, vetted furniture, and finally after a while came to a startling realization. Where we failed at vetting everything from cockroaches, The Spiders succeeded and ate them, then reduced their numbers naturally. I now love spiders. Spotted one yesterday and put it on a fern I had watered recently. Hopefully he got a sip.
(and they aren't retarded, no they don't go in your mouth when you sleep)
I tend to leave the spiders alone except for the black widows. They can burn in hell. I just wish my spiders would eat the ants. I'm always doing battle with the ants getting in the house. I think my house was built on some sort of super colony.