HOW TO REMOVE URINE STAINS FROM UPHOLSTERY Blot the urine stain using a towel. Be careful not to spread the stain onto other parts of the furniture. Mix 1 tablespoon of liquid dish soap, 1 tablespoon of vinegar with two cups of cold water. Dip a clean white cloth into the solution and gently sponge the stain. If the urine stain is still visible after repeating these steps, apply a few drops of 3 hydrogen peroxide. You can follow by applying a few drops of ammonia to the stain as well.