If your dwelling has excessive humidity, consider purchasing and using a dehumidifier to reduce the humidity. Empty the tank frequently to prevent its use as a water source by cockroaches. At least once a month, check the drip pan under the refrigerator. Clean and dry the pan before replacing it. Remove Their Food Supply Stored Food.
Cockroaches eat just about anything.
All food items must be kept in a sealed container. Once a package of food is opened, make sure it is tightly resealed. If the original package doesn't reseal tightly enough, place the food product in a tightly sealed container. Cockroaches can easily chew through paper, cardboard, or thin plastic containers, so food items packaged in these materials should be transferred to cockroach-proof containers before being stored in the home. No open food should be left out overnight.