(12oz) Washer Magic is specifically designed to remove the scale and hard water build up from washer tubs that damages clothes. Washer Magic increases the solubility of lime scale buildup - use it every month to help clean rust and lime buildup, odor-causing residue, and maintain water performance.  Clean washers are gentler on clothes, extending clothing life.  Use fore frequently for strong odors or in hard water areas.  Works on both top load and front load washing machines.