Sometimes, water stains are caused by the minerals or impurities in tap water that leave residue after evaporation. · mix a diy cleaner using 2 cups of distilled water , 2 tablespoons of clear dawn dish soap, and 2 tablespoons of distilled white vinegar. Many fabric couches can typically be cleaned using a general-purpose water -based cleaner. Again, work in sections. Distilled water lacks these impurities and can help lift the stain. Combine distilled white vinegar with water at a 1:3 ratio with about one to two squeezes of dish soap or castile soap—about a tablespoon per cup. Always spot test first to ensure it won’t damage your couch’s fabric, keeping your upholstery looking fresh and clean. · after some research and personal experiments, i’ve found a foolproof method to deal with those pesky water stains, and im thrilled to share it with you all in this youtube video! Use distilled water mixed dish soap and vinegar to clean your couch instead. After spraying, use a clean sponge to work it into the couch until you can no longer see the water stains. To clean water stains on a microfiber couch , pour some distilled water (not tap water!) into a spray bottle and spray it on the couch. · we recommend a gentle cleaning solution of 2 cups distilled water, 1 tablespoon dish soap, and 1 tablespoon white vinegar. Check the code on your sofas cleaning label before using any methods with water. Dampen a lint-free cloth with this solution, and gently wipe the fabric to clean your couch. · one effective method to remove a water stain from a couch is to use distilled water. · tap water contains minerals that leave residue and cause damage to couches.