How to kill cockroaches in the canteen and how to kill cockroaches in the restaurant?

Safety and environmental protection. Poison bait is a common and simple method to kill cockroaches, but the trick to use it properly lies in "multiple points and wide areas", that is, putting more poison bait points in a room and distributing them more widely. In this way, cockroaches can eat poison bait when they climb out of their habitat, and the killing effect is remarkable. Draw a straight line around the gaps, holes and corners where cockroaches live and often move, so that cockroaches can be poisoned when they go in and out. The drawn road should not be too thin, it should be a thick line of 1 cm.