There are major differences in how carpets and furnishings are cleaned. For upholstery fabric, it is important not to use an excess of water, as this can cause bacteria or mold to grow, bring out unpleasant odors and cause the fabric to becomes soiled more quickly in the future. Depending upon the particular type of fabric, too much water in the cleaning process may even damage it. Upholstery in general requires gentler handling and specific cleaning methods according to the fabric.