Three words: Bengal Roach Spray. http://www.bengal.com/
Forget everything you think you know about the war on roaches. My neighbor gave me some of this stuff and let me tell you, you spray a line around your baseboards
or whatever, and any bug that starts crossing the line will not make it to the other side. Roaches, ants, centipedes, pill bugs, whatever. I would find a line of dead insects every day. (Bugs are taking over GA!) This stuff works, and was still working in my apartment months later.