Stains on acoustical wall carpet should be treated quickly. A solution of one tablespoon of dry powder detergent to one pint of lukewarm water is effective on many water-borne stains. With solid stains, scrape up the excess working from the outside to the middle to prevent spreading. If a liquid is spilled, blot with an absorbent cloth, again working from the outside in. Then sponge with the detergent solution and blot with a paper towel. For stubborn stains, it may be necessary to sponge with a non-chlorine bleach solution or a dry cleaning solvent. Occasional vacuuming will help maintain the product’s fresh look