Cockroach is always looking for a house that the owner provided the three: food, water and shelter for them to live. If the three is available in your house, that is enough for them to nest and duplicate to thousands. If the three is not available, roaches cannot live in.
The question is: is there any house where is no water and food in it? The answer is no. We cannot live without water and food ourselves. It means, every house provides food, water and shelter for roach to live. So, how can we protect our house of roach infestation? The answer is: we need to make our house environment is not comfortable for roach. We need to block every access and something that roaches do not like, we need roach repeller.
There are so many roach repeller in the market, but if you want to find something saver and natural, the following roach repeller might make your home is uncomfortable place for cockroach to live:
Mothballs are made from naphthalene, and roach do not like the smell. You can put one or two moth balls in the closet, in the cabinet under the sink, behind the stove or any place that potentially roach infestation. You need to place the moth balls safely according to manufacturer’s instruction. Moth balls / naphthalene are toxic to human. High levels of exposure can cause nausea, vomiting and diarrhea. Do not place any moth balls near food of food preparation area.