Cleaning an espresso machine using a specialized cleaning agent and forcing water backward through the system removes coffee residue and oils buildup. This process typically involves using a blind filter, a small, solid disc that replaces the portafilter and prevents water from escaping. The detergent is added to the blind filter, and the machine is activated in short bursts, pushing the solution through the brewing group and clearing out internal pathways.
Regular cleaning contributes significantly to the longevity and consistent performance of espresso machines. By removing built-up coffee oils and grounds, the process prevents bitter flavors in the espresso and protects internal components from clogging and damage. This preventative maintenance avoids costly repairs and ensures a consistently high-quality beverage. Historically, backflushing has become a standard practice with the rise of pump-driven espresso machines and the recognition of the impact of residue on flavor and machine performance.
