Question: what is the best carpet cleaner for old stains?
Answer: BEST OVERALL: Naturally It's Clean Carpet Stains & Odors Cleaner. ...  BEST FOR GREASE SPOTS: Folex Instant Carpet Spot Remover. ...  BEST FOR WINE STAINS: Chateau Spill Red Wine Stain Remover Spray. ...  BEST FOR PET MESSES: Bissell Professional Stain & Odor.