ECM Descaler Pack of 10 Sachets The secret to brewing excellent espresso at home is to keep your machine clean and in good working order. To do that, periodic descaling is an important part of your maintenance routine, especially if you’re using unfiltered water. ECM’s descaling packets gently clean the inside of your semi-automatic espresso machine and prevent scale buildup that can prevent your machine from working optimally. Sold in a pack of 10 sachets of descaling powder. Use only as directed.