Hard water and lime scale can do serious damage to coffee makers and espresso machines in no time. Buildup on the boiler prevents it from heating properly and lime deposits can clog up water lines. Left untreated these things can cause machine failure. Cleancaf has developed an easy-to-use, non-toxic cleaner and scale remover. Simply dissolve the citric-acid based powder in warm water and add it to the coffee machine's water reservoir. The solution gently works on the buildup until it dissolves. Fresh water will then fill your machine and flush through the system. Each packet of cleaner is sufficient for one cleaning. There are three packets to a box. Recommended for all types of coffee makers, espresso machines and appliances that heat water (including irons, steamers and tea kettles).