Mineral scale in your hot water tank can clog water flow and negatively affect brew temperature - this results in beverage inconsistency. To prevent your machine from clogging and breaking down, your beverage equipment should be descaled regularly. Dezcal is a safe option for removing lime scale build-up in your machine. Dezcal™ can be used on home coffee brewers, espresso machines (traditional and automatic), kettles, and pod and capsule machines. NSF certified for metal compatibility. For best results, use quarterly (water hardness in your area may require more or less frequent descaling).