Add 2oz. (1/4 bottle) of cleaner to each of soap solution. Helps make good rich lather. Keeps lather dispenser clean. Frees sluggish parts, eliminates clogged soap passages, helps prevent soap deposits. Ideal for hard water areas. Cleaner may also be used to clean the machine by adding 2 to 4 caps full of cleaner to soap cup, add warm water and run machine.