They do not live on vinyl or hardwood floors. Mites require a relative humidity of 50 percent or greater. When it is warm and humid, the number of mites increases rapidly. Bathroom showers that send steam directly into the bedroom rather than out of vents are also a primary source of moisture. Heating a bedroom during periods of cold weather will dry the air, and decrease the relative humidity.
Dry air reduces the number of mites.
What you can do Unfortunately, we cannot effectively remove the mites' food source and it is difficult to control the indoor humidity. Heating the bedroom regularly will lower the relative humidity and reduce the number of mites, especially during cool weather. If your bedroom is located over a crawl space, install a vapor barrier. Lay a roll of heavy duty plastic on the ground overlapping it onto the crawl space walls. Insulate the bedroom floor to decrease the mustiness of the bedroom.