How to kill cockroaches quickly?

First of all, clean up the dead corner of the house, preferably a general cleaning. Cockroaches like dark and damp places in dead corners of walls, so they must be cleaned. Then, buy a bottle of dichlorvos (EC) and dilute it with water in proportion. I usually use the concentration of 1: 80, that is, a small paper cup of dichlorvos is mixed with a basin of water and sprayed to every corner of the house, especially the cracks in the wall. Be safe. Close the doors and windows after spraying. No one can live in the room, and it will be stuffy for a long time. Finally, ventilate and disperse the smell, preferably for more than 2 hours. It's difficult to clean cockroaches at once, but you must clean them many times and stick to it. If there are cockroaches in the whole building, the whole building needs to be mobilized. Clean up the garbage at home in time, and don't put leftovers in the kitchen.