This method uses very high temperature steam to get in deep into the carpet muscle. When the rug is done washing, it appears out on the machine lightly damp. Others need expose of a spet carpet removal. When an carpet is dried quickly and properly there will be no smell. http://ttp//Selfstorageinsiders.com%2Fquestion%2Fpractical-uses-of-your-wet-dry-vac-in-carpet-cleaning-18%2F/