This stuff is absolutely necessary for any shop's consistent upkeep on an espresso machine. It's amazing and makes your life substantially easier as you keep your machine clean, maintained, and producing optimal flavor from your high-quality coffee. end short description While you'll surely want to use it for keeping your group-heads clean and for back-flushing purposes, our team also finds it handy to clean many other surfaces that build up oily residue from contact with coffee. This stuff is the kind of thing you want on-hand, and you weep openly the day you find you've run out. Never run out.