When cutting onions, they are often smoked to tears because of their strong flavor. That will naturally be effective for small cockroaches. Its principle is to drive them away with the smell of onions and make them afraid to come back later. Put chopped onions on both sides of the door, preferably at the crack of the door, so that the cockroaches can retreat. At the same time, some can also be placed at the bedside of the bedroom. Onions have the function of disinfection.

2, laundry detergent or washing powder

Cockroaches have a keen sense of smell and are particularly afraid of the smell of laundry detergent. Therefore, they mixed the laundry detergent with water and dragged the room again, leaving a smell on the floor. When cockroaches climb, because they can't stand the smell, they will inevitably give up halfway.

Cockroaches enter houses mainly through the following ways:

1. There are cockroaches in the neighbor's home or community, and cockroaches directly enter the home from the outside through sewers and electric wires and pipes.

2. Bring cockroaches home through suitcases, shopping bags and packing boxes.

All buildings where people live and live generally have these conditions, so cockroaches have become health pests that infringe on thousands of households.