Control with insecticides To control cockroaches with insecticide, find their daytime hiding place and thoroughly treat those areas. Place insecticides in or near regular hiding places. But remember you must clean before applying insecticides so they can be effective. When they eat the poison food they die. These stations are sold in grocery stores.
Sprays are easy and fast to apply.
The spray should wet or dampen the treated surface, but not puddle. Spray cracks and crevices where cockroaches hide. Dusts are applied in crevices and cracks, under refrigerators and around sinks and cabinets. Apply dust insecticide lightly, where it is barely visible. Boric acid is one inexpensive insecticide for cockroaches.