Sage descaling agent (4 pack) is recommended for all of our espresso machines. The descaling agent removes lime deposits from espresso machines, coffee machines and also suitable for kettles. It is biodegradable. Clean with food safe cleaner. Regular descaling ensures a longer life and better taste. We recommend descaling approximately once every 1 to 1.5 months. The more expensive machines will also alert you when it is time to perform descaling.