WHAT DO THE MANUFACTURERS RECOMMEND?

.....We use the only method recommended by major carpet and fiber manufacturers for the restoration of your carpet and the health of your family. That is the hot water extraction method using the truck-mounted unit. No other method removes soil, contaminants and detergent residue to keep carpets cleaner longer.

.....Here is what Shaw Industries, the world's largest carpet manufacturer, has to say about how to professionally clean your carpets:

....."We recommend the hot water extraction system, which research indicates provides the best capability for cleaning.

.....True professionals also make the investment in training (through the IICRC) to understand the equipment, to know the proper cleaning agents for the situation at hand, and to recognize the differences in fibers and carpet construction."

from "CarpetCare" by Shaw Industries, Inc.