Urnex: Cafiza PowderEspresso machine cleaning powder 566 g jar (20 oz) Eliminates coffee residue and oils from espresso machine groupheads, valves and lines. Keeps screens and filters clear for even extraction. (Can also be used to make a soaking solution to clean portafilters, baskets, screens, and other parts) Formulated for optimal balance of solubility and foaming. Odorless How to Backflush Insert blind filter in portafilter and add up to 1 2 teaspoon (3 g) of Cafiza