Collins & Aikman Floorcoverings, a Dalton,
GA-based carpet manufacturer, states in its maintenance guide that the
company "will not warrant problems caused by poor or improper
maintenance."
The company identifies four "non-approved" carpet cleaning methods:
Dry foam. "Detergent is difficult to remove, contributing to rapid re-soiling. Does not deep clean."
Rotary brush. "Detergent is difficult to remove, contributing
to rapid re-soiling, and the action of the brushes can cause pile
distortion. Does not deep clean."
Bonnet. "This method only affects the surface of the carpet.
The buffing action can distort the carpet pile and grind dirt deeper
into the pile, and the spinning action of the pad can distort face
yarn."
Dry powders. "Not recommended as a primary cleaning method
for [company] products. Use instructions for dry powders must be
closely followed to make sure powders do not build up in the carpet
which result in performance problems."
Collins & Aikman says that water extraction "is the recommended and most effective method to deep clean."