Instructions Instructions for espresso machine 1. When a water filter is placed in the water tank of your espresso machine, remove it. 2. Empty one of the sachets into 1 litre of warm water. Let the descaler dissolve, and then pour into the water tank. 3. Refer to the machine manufacturer’s instructions to descale. 4. Always rinse thoroughly with fresh water after use. 5. Re-place the water filter.