Descaling your Classic Pro is just like the standard procedure for any espresso machine. There is a descale indicator present on your Classic Pro, and it will tell you that it's time to run the cleanup process. You can use a normal degreaser product and place them in the filter basket to degrease your machine. Make sure to flush out the water multiple times. It'll ensure no water softeners or degreasing tablets remain in the basket or on the inside of your machine.