1. Always keep hidden places clean. Looking for the source of insects can suddenly turn on the light when cockroaches are moving around at night, observe where cockroaches are and where they are going, and then find their hidden places and then destroy them.

2. Seal the gap. Apply paper reinforcement and lime (511 grams of paper reinforcement and 51 kilograms of lime, and then add water to make it) to all gaps, and plug the gaps.

3. fumigation. If there are too many cockroaches in warehouses, factories or indoors, when the harm is serious, sulfur or aluminum phosphide can be used for fumigation and extermination.

4. Sticky glue. Taking advantage of the cockroach's habit of drilling cracks, a paper box with some cracks on the cover is used, and the box is coated with adhesive and sprinkled with some fresh bread crumbs, so that the cockroach can get in and steal and get stuck.

5. Sprinkle some hard diatomite. Taking advantage of the habit that cockroaches like to scrape dirt off their backs on hard objects, we sprinkle some hard and sharp diatomite in the corner of the room. When cockroaches go there to rub their bodies, the wax oil on the surface will be wiped off too much. As a result, a lot of water in cockroaches will be lost and dehydrated to death.