as you may have seen me mentioned, there are cockroaches living in my kitchen. my flat put these traps in the kitchen to catch some of the little bastards, and it seems to be working.
they're basically a bit like those sticky flytrap things, except they're (apparently) baited to appeal to the little bastards. so they wander in, and get stuck.
except they don't die. one has been been in there for three days, and still waggles his antenni.
to reiterate: i hate cockroaches.