Find out the place where they are coming from
Getting to know about the source is extremely important. You can only control or get rid of cockroaches if you know where they are coming from. You must check the places where you find cockroaches like the kitchen or the garage. Look for any holes or cracks in the place where they may be entering from. Also, look into any drains or vents as they are the most common places where cockroaches are found.
Kill the cockroaches
There are various ways through which you can kill cockroaches. The use of insect killers, powdered boric acid or liquid concentrates is the most common ways to get rid of cockroaches. You can build traps or baits around the place where they are entering for much better results. Water jars and soda bottles may also help your cause. Remember to spray or apply any insecticide during the night as that is the time when cockroaches come out.
Killing a number of cockroaches does not necessarily mean they will not return. You will have to take preventive measures to make sure they do not return. This will include sealing any cracks and holes in the area. You must also make sure that the trash is emptied on a regular basis and also get any dripping faucets fixed in the kitchen or washroom areas. You can also consult a pest-control expert on this matter. A spray every month will ensure there is no problem in the future.