Cockroaches can be frustrating pests. Once they start growing, there seem to be everywhere. Kitchen, diswasher, and every nook and corner of the house that you cannot reach. The disturbing high pitched sounds they make could cause sleep deprivation. However, getting rid of these pests is easy as a pie if you know how
Take boric acid one part and mix it with equal amount of flour and half the amount of powdered sugar.
Then make it into a dough by adding some water to it.
Make small balls and leave the balls at the locations where you find cockroaches.
Within days, all the cockroaches will drop dead and your problem will be solved.
Discard the utensil in which you prepare the dough.
Take care if you own pets however. Use food grade "diatomaceous earth" in that case.