Soap scum can be easily removed from walls and grout with natural cleaning products like borax, baking soda, vinegar and pumice stones. Allow any of these products to sit for at least 15 minutes to get the most out of the cleaning process. Borax and baking soda can be combined in a solution of one cup powder and one to two tablespoons dishwashing liquid or detergent. Add enough water to form a paste. Vinegar should be mixed with equal parts water and one tablespoon dish detergent for best results.
