Gelbait emits pheromones, which are fe-male cockroach hormones. To rid your apartment or house of roaches, pour Lysol in the toilet to pollute their drinking water, and down the drain to poison the entrance. Don't overwater plants, put the recycling outside, vacuum rugs for crumbs, wash dishes in hot water and soap and seal trash and all food containers. Removing the food supply in your house will keep them from coming back, especially if cracks and the seals are caulked shut. Cockroaches not only enter apartments through cracks in the wall, but by clinging on to people, belongings or clothes.
Roaches stay anywhere that has shelter and food.
According to Cullen, Terminix offers a free inspection and the cost of an extermination is dependent on the size of the problem. There are a lot of dangerous chemicals out there, but the real danger is with unlicensed handling of chemicals.