The machine maintainence is a breeze if you are consistent and take care of it. The Claris filter is replaced every two months and has a reminder on the top of  the filter (If you use the Claris, you do not need to decalcify the machine). The brew group is cleaned weekly (pending on use) I usally clean the screen after the dump box light comes on to be emptied. I use mostly Starbucks and Illy and the oil from Starbucks can clog a screen if you do not wipe it off every so often with a paper towel (explained in manual) Every 200 pull's or within 4 -6 months you will need to drop a self clean tablet in the bypass doser. The C1000 takes care of the rest in about 30 minutes time.
The 1150W DeLonghi ESAM3500.N is capable of preparing a wide range of coffee drinks, including lattes, cappuccinos, coffee, espresso and more. You can easily brew directly into the twelve oz cups, demitasse or espresso thanks to the height adjustable coffee spouts this model comes with. Thanks to the instant reheat function, keeping the ESAM3500.N at the right temperature is a breeze, regardless of the length of time between cups.
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