Cockroaches as we know love to remain in dark, dump and dirty areas, they carry many harmful bacteria and germs along with them. Cockroaches tend to congregate in corners and generally travel along the edge of walls or other surfaces. Cockroaches feed on the food left outs spilled on the ground, kitchen slab, etc. They can even contaminate uncovered foods, vegetables, fruits, etc. Cockroach litters are also harmful. Cockroaches sometimes lay their eggs on the clothes we wear which can cause many allergies and skin disorder.