Each method has advantages and disadvantages. Costs in dollars, time, and energy vary, as do skill needed to do a good job. Always vacuum thoroughly before starting cleaning method. Follow the cleaner and equipment instructions as directed. Do not over wet the carpet.
Excess moisture can cause shrinkage, streaks, or mildew.
Keep mechanical action to a minimum to avoid carpet damage or streaks . In the dry powder method, absorbent granules containing dry cleaning solvent are sprinkled over a section of carpet and worked into the pile by mechanical or hand brush. The dry cleaning solvent dissolves oils and greasy soil. These are then absorbed by the granules. When thoroughly dry, the carpet is vacuumed.