How do I descale (remove limescale from) the Esperto Caffè machine?

When the 'vízkőmentesítés' (descaling) indicator appears on the display, use a commercial liquid descaling solution made for coffee and espresso machines. Fill the empty water tank with the descaling solution, place a 500ml container under the spout, turn on the machine, and follow the descaling process which takes approximately 15 minutes. After descaling, perform a rinsing phase with fresh water.