Steam cleaning can eliminate hidden roaches from furniture, clothing, appliance or other areas, but should only be used on surfaces not damaged by heat and water. This method is good for, as an example, cleaning a garbage chute. Boric acid is a stomach and contact poison for roaches, although it has a low acute toxicity to humans and other mammals. However, it should NOT be applied near food, or in areas that children or pets may reach. To control cockroaches, it should be dusted into cracks and crevices, or blown into wall voids.
Boric acid is also available in gel form.
Silica gel can damage the lungs if inhaled, so make sure to use a dust mask during application. Diatomaceous earth is less effective than silica gel or boric acid in the treatment of cockroaches, because they are repelled by the substance. Like boric acid, these substances are applied under appliances and cabinets, around holes and in cracks. Although cockroaches can seem invincible, they are not. Take the steps above to keep your home from becoming a cockroach haven, and you can alleviate your anxieties and avoid the application of toxic pesticides at the same time.