Urnex Cafiza is a formulated powder to remove residue, rancid coffee oils, and limescale deposits from your espresso machine. This product is used to backflush semi-commercial and commercial espresso machines as well as clean any metal parts such as screens and filter baskets. Eliminates coffee residue and oils from espresso machine group heads, valves and lines Specially formulated to clean heavily soiled equipment in a professional setting Powder format allows for easy and controlled dosing Recommended for use as part of a daily backflush regimen Organic Materials Review Institute (OMRI) listed and NSF certified Cafiza is food safe, and non-toxic, and works great for cleaning any part of the machine that comes into contact with the coffee. This product is not a decalcifier and should not be dissolved in a reservoir or put through a boiler.