When your coffee maker's heating elements are compromised by mineral scale build up, water does not heat to proper coffee brewing temperature, causing coffee to taste bitter. CleanCup Coffee Machine Descaling Liquid removes mineral build up such as lime scale from the heating elements of your K-Cup coffee machine. Without regular descaling, your single cup coffee machine can become clogged, water becomes cloudy and overall performance and taste is diminished. CleanCup Coffee Machine Descaling Liquid does not leave behind the lingering smell and taste of vinegar and contains only non-toxic ingredients. Descale once a month for a single serve coffee maker that operates at its best and enjoy better tasting coffee!