Most dry-cleaning machines have a system of counter-revolving brushes which are designed to thoroughly circulate the absorbent compound through the carpet yarns. This insures that the cleaning chemicals come into contact with the dirty surfaces of the carpet fibers. The brushing action also lifts and raises the pile of the carpet for better results and improved appearance.
Start in one corner of the area and brush sideways across the carpet using push-pull strokes to create an overlapping “W” pattern. If the machine has a built-in vacuum, make sure the vacuum is off during this procedure. At the end of the row, step back to start a second row. Move sideways back across the area, overlapping about half of the first row. Continue brushing the entire area in this way. Then turn 90° to face across the area. Using the same technique as in the 1st pass, brush the area again.
Turn back to face the original direction and completely brush the area a third time. Heavily soiled areas and tough spots may require some extra brushing. Apply more dry carpet cleaner and brush again, the more brushing the better the cleaning.
If the machine being used does not have a built-in vacuum, allow the dry absorbent compound to dry and then vacuum with an upright vacuum to remove the compound and the dirt it has absorbed.
If the machine being used has a built-in vacuum, turn the vacuum on and vacuum immediately after brushing using the same pattern as the brushing technique. Use and extension hose to vacuum edges and corners.