Build a cockroach trap. Smear a thin layer of Vaseline around the inside lip of a pint jar to a width of about 2 inches. Place the jar upright, with bait inside, in an area frequented by cockroaches. Apple and potato make excellent bait for American, smoky-brown, and brown-banded roaches,
****while German roaches prefer banana peel.****
Change the bait often because fresh food is more appealing to roaches. Another trap can be made by dusting the inside of a jar lightly with talcum powder and using the same bait food. Roaches entering the jar are unable to climb back out over the petroleum jelly or talcum powder barrier.