this site may be helpful
http://reviews.ebay.com/KIRBY-CARPET-SHAMPOOER-INSTRUCTIONS-MANUAL-DIRECTIONS_W0QQugidZ10000000004594992make sure the brushes on the shampooer head are spinning and that you have the shampooer head lowered all the way down to its lowest setting. Also...shampoo at a slower pace than you would move when vacuuming...when both putting down the suds on heavily soiled areas and scooping them up. The more oils in the carpet, the less suds you'll see when the shampooer is working properly.
one more thing that may be mentioned in the guide is the little round sud screen that attaches to one end of the shampooer hose...make sure that little mesh screen is there and seated properly. It is what produces the suds from the shampoo solution.
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