Dust problem areas with tannic acid powder, available at health food stores and pet centers. Cover mattress and pillows with laminated covers which prevent penetration by dust mites. Avoid fabric-covered headboards. Cover heating ducts with a filter which can trap tiny dust particles smaller than 10 microns. Avoid using humidifiers.
Dust mites thrive on warmth and humidity.
Cockroaches The best defense against cockroaches is a clean kitchen and bathroom. If roaches are a problem in your home or apartment, vacuum well and wash the area with a strong soap. Dispose of vacuum cleaner bags in a sealed container. Catnip is a natural repellent to cockroaches. The active ingredient is nepetalactone, which is non-toxic to humans and pets.