Mix two teaspoons white vinegar with one cup warm water. Warm oven, moisten any spills, sprinkle them with baking soda or salt, and scrub. Seal cracks, keep windows and doors closed, and keep food and water in tightly sealed containers. Wipe kitchen cabinets and pantry shelves with equal parts vinegar and water. Dust a very thin film of boric acid powder or Drione on surfaces and into cracks and crevices.
Boric acid is also an effective way to control ants.
Keep boric acid out of reach of children and pets, and do not place on food preparation surfaces. Use non-toxic roach traps. Sprinkle chili powder around possible entry areas. Wash kitchen counters with equal parts vinegar and water. Plant pennyroyal, peppermint and tansy around your home.