Rinza is a total necessity for your steam wand / pitchers. Used regularly in the commercial environment, this is one of those solutions you just always want to have in your cleaning producers. From Urnex: Breaks down milk protein and fat buildup on auto frothers, steam wands and frothing pitchers. Comes in a dual-chamber 1 liter bottle that contains a built-in measuring device. Dilute at a ratio of 30 mL of Rinza per 500 mL of water