Bunn Cleaning Products, Rinza Milk Frother Cleaner (1 Liter Bottle). Breaks down milk protein buildup. Cycles through auto-frothers for easy cleanup. Also cleans traditional steam wands and steel pitchers. Built-in measuring device delivers over 30 uses per bottle and is very cost effective. Directions for use on Automatic Milk Frother: 1. To fill measuring cup loosen cap and squeeze bottle. Mix solution of 15-30 ml Rinza® Milk Frother Cleaner per 500 ml cold water. 2. Insert suction tube into solution. 3. Run entire solution through frother. 4. Repeat above with clean cold water to thoroughly rinse all components. 5. Make and discard a cup of espresso to ensure no residue remains. Directiond for use on Steam Wands and other dairy-related equipment: 1. Soak parts or steam wand for 15-30 minutes in 30 ml Rinza® Milk Frother Cleaner per 500 ml warm water. 2. Rinse all components.