Minerals that are present in water, like calcium and magnesium, pass through the coffeemachine and over time get deposited inside the machine as limescale. Descaling is theprocess of removing that mineral buildup. This ensures that your cup of coffee alwaystastes exactly how it should and also helps prolong the life of your machine.For detailed instructions on Descaling, Cleaning & Maintenance, please refer to theproduct User Manual and also watch our video tutorial