Step 1: Pour 75ml of HG descaler in the water reservoir and fill it up to 750ml with water.
Step 2: Leave the solution to work for 10 minutes. Turn on the machine and let half of the solution to run through.
Step 3: Switch off the machine and let it work for 10 minutes. Let the rest of the solution run through until the reservoir is empty.
Step 4: Rinse the machine with clean water.