Kill cockroaches physically. There is sticky trap method, using sticky cockroach paper or sticky cockroach box to trap cockroaches, easy to use and good effect; Bait and kill method: put a little sweet bait, such as bread gimmick, in an empty beer bottle or can. After smearing oil on the mouth of the bottle, build a small paper bridge and put the mouth of the bottle against the wall, so that cockroaches can't climb out; Hot killing method, can directly irrigate the cockroach habitat activity place with boiling water, can effectively hot kill cockroaches. The above methods are recommended by cockroach control companies.