Recurring cockroach problem

Dear sir, At my house, there are lots of cockroaches. Size about 0.1 cm to 1 cm. It start seen from last year April/May. I talked with a pesticides Co. They checked and used pest control. At that time, they killed a lot. After few days, it showed again. Company came again and used pest control. In three months, 3 times pest control had been used. Everything went back to normal even more. They said , they can’t use more powerful kit. I don’t know, how to get rid of these cockroaches. Please advise me the solution. We have children at home. Waiting for your suggestions.

The most common reason for cockroach problems is poor sanitation. Insecticides and poison bait can not be effective if there is a food source for them.   Read more:  http://pestcontrolcanada.com/cockroaches