House dust mites are associated with allergies and with people worldwide who suffer from asthma. They are unwanted guests in every home. They thrive on flakes of shed human skin. The mite's gut contains potent digestive enzymes which they poop everywhere which can induce wheezing in allergic individuals. It has been discovered that charcoal fibers are a potent house dust mite insecticide. Who would have guessed? Below is some interesting research. How to use the charcoal fiber cloth as a deterent is left to one's creativity, but some install the charcoal cloth in heat vents.