You Must Descale
Standard tap water contains all varieties of impurities, among them are calcium and magnesium. Unless you are using softened, filtered water, your Super Automatic espresso machine's boiler and other parts are lined with scale. The heating element draws the minerals out of the water and bakes them onto itself, literally forming rock inside your machine. This creates all sorts of problems such as reduced water flow, low temperatures, and shortened life of the unit.