Roach foggers can be an effective tool. However, they should be used in conjunction with other treatment methods to be most effective. It is important when using a fogger that the total air space be considered. Often times, we see home owners using a fogger that is designed to treat 100 cubic feet in a space that is 1000 cubic feet. It is important to follow label directions at all times, not just from a safety point of view but also from an effectiveness of treatment aspect.