They feed on mold and other dead insects, but will also graze on paper and paste. They also eat dried plant materials. Cockroaches damage paper, cardboard, clothing and furniture by eating starch, mold, proteins and other residues on the surface. They also stain materials with their droppings, and adhere their egg cases to objects. There are a number of practical things which you can do to prevent an insect infestation in your home.
Prevention is always better than having to respond to an outbreak.
Make sure your screens are secure to restrain insects from entering the house. Outdoor lights act to attract insects to the house. During termite swarms, turn off the lights in your house. Coolness and dryness inhibits their activity and growth. If possible, lower the temperature and humidity in your home by increasing air circulation, or installing an air conditioner and de-humidifier.