You have to keep your espresso machine sparkling clean or residual build up can adversely affect the quality of the espresso it produces. Cafiza Espresso Machine Cleaner Powder by Urnex is an integral part of the daily maintenance routine for espresso machines. Specifically formulated for effective use in the back flush cleaning process, Cafiza is designed to combine maximum solubility and cleaning power with easy rinsability. It is recommended for use with a wide-range of traditional espresso machines and is also NSF certified for metal compatibility and safety.