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How to clean filter and portafilter

In this tutorial Andrej Godina show us how to clean the filter and portafilter of a coffee machine. Few minutes to grant a perfect cup of coffee. The espresso machine can be defined as a "pot" in which the espresso is formed, a place where, when cooking is finished, food residues deposit: no one would dream of cooking in a dirty pot! And nobody should dispense an espresso from a machine in which residues of fats, carbonaceous deposits and scale — the "dirt" left by each coffee extraction — have been accumulating for days. If they are not periodically removed, these substances turn rancid, altering the taste of the beverage and preventing correct extraction. They hinder good machine operation because they obstruct the holes in the dispensing unit and in the discharge valve.