Regularly descaling your coffee machine is essential. Your coffee machine may have an automated process but you should only use the exclusive De’Longhi descaler EcoDecalk.
It is powerful, fast, safe and ecological. De’Longhi EcoDecalk uses only natural materials. All fully automatic coffee machines come with one single use pack of descaler in pack.  
To descale you simply add the fluid to the water tank, with fresh cold water and follow the simple instructions on your automatic coffee machine.