How often should I descale my espresso machine?
It is recommended to descale your machine every 4-6 months, although this period will depend on the hardness of your water and frequency of use. You can use Espresso Machine Descaling Tablets, liquid descaler, or white vinegar and warm water for the descaling process. (Page 20)
From the official Calphalon Espresso Machine manual, page 20
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