How do you clean an espresso machine?

Cleaning an espresso machine requires proper maintenance to ensure optimal performance and longevity. Regularly purging the steam wand and backflushing the group head is crucial because it prevents the buildup of milk residue and coffee oils, which can affect the taste of the espresso and lead to malfunctions. Purging the steam wand removes any residual milk, which is essential since milk can scorch or clog the wand if not cleaned properly. Backflushing involves using a blind filter to flush out coffee oils and grounds from the group head; this is necessary for maintaining the cleanliness and functionality of the brewing components.

Other methods mentioned, such as only washing external parts, do not address the internal components that are critical for the machine’s operation. Using vinegar can damage certain parts of the espresso machine; it's not a recommended cleaning agent for regular maintenance. While rinsing with plain water after use is a good practice, it alone is not sufficient for deep cleaning. Regular purging and backflushing provide a more comprehensive approach required to maintain the espresso machine effectively.