√ Quality Guarantee √ Click & Collect √ 2 Working Days Delivery Coffee machine Descaler - 250ml. How to use: 1- Remove the filter from your water tank (if there is any); 2- Fill the tank with water and pour 50ml of the descaler product; 3- Run the descale cycle in your machine; 4- After this process, rinse the water tank, fit the filter back to the right position and fill the tank again; 5- That's it, your machine is ready to use and make a tasty coffee for you enjoy it!