Vinegar : Descale your Delonghi coffee machine regularly. This will prevent the build-up of minerals inside the machine. You can purchase a descaling solution from a store, but a cheaper alternative is to use vinegar. Vinegar is an inexpensive solution that can remove limescale deposits from the inner components of your machine.
Commercial descaling solution : Delonghi coffee machines have a particular descaling program that removes calcium deposits from the machine's internal components.
Recommendations : If you have a Delonghi coffee, you must descale it regularly. This is to prevent the buildup of limescale that could damage the heating element. This can be done by pressing the descaling button on your machine for about five seconds. Once the descaling process is completed, you must rinse the water reservoir with clean tap water.