The Zerorez® Cleaning Process does not use soaps, harsh detergents or shampoos to clean, but uses our three-step process: the zr lifter® lifts dead skin, hair and other particulates from your carpet; with our Powered Water®, we then rinse your carpet fibers with our high-pressure and controlled patented zr wand™ that extracts the dirt and soil, leaving your carpet Residue Free®. Zero Residue Means Cleaner Longer®!