The term " steam " is a misnomer. No one in the industry uses live steam to clean carpets. Instead, via a truck-mounted system ( or portable, when necessary ), the cleaning solution is heated and injected, under pressure, into the carpet fibers. This is followed by immediate extraction and FRESH WATER rinse of the cleaning agents and the soil, leaving the carpet free of residue. Our techniques are safe for wools, synthetics, and carpets with built-in stain block technology. The Wool bureau, along with many carpet manufacturers and fiber producers, recognize hot water extraction as the preferred method for the removal of dry and water soluble soils.