Espresso machines accumulate coffee oils in the group head, portafilter, and basket — oils that go rancid within days and directly affect espresso taste. Scale builds up in the boiler from mineral deposits in the water. Regular cleaning is both a maintenance and coffee quality issue.
After Every Use (Daily)
- Remove the portafilter immediately after pulling the shot and knock out the puck
- Rinse the portafilter basket under hot water and wipe dry
- Run a 2–3 second water flush through the group head (without the portafilter) to clear residual coffee oils from the shower screen
- Wipe the shower screen and group head gasket with a damp cloth
- Purge the steam wand immediately after steaming by opening the steam briefly to push out residual milk, then wipe with a damp cloth — milk proteins bake onto the wand within minutes
Backflushing (Weekly — Machines with 3-Way Solenoid Valve)
Most prosumer and commercial-style home machines have a 3-way solenoid valve and can be backflushed:
- Insert a blind (solid) basket into the portafilter
- Add a small amount of espresso machine cleaning powder (such as Cafiza) to the blind basket
- Insert the portafilter and run the pump for 10 seconds on, 10 seconds off for 5–8 cycles
- Repeat with clean water (no powder) for 2–3 cycles to rinse
- Remove the portafilter and flush the group head with water
Descaling (Every 2–3 Months)
- Use a commercial espresso machine descaler — follow the product's dilution ratio
- Fill the water tank with the descaling solution
- Run the solution through the group head and steam wand in multiple cycles (stop when tank is empty)
- Refill with clean water and run 2–3 full tanks of plain water through to rinse
- Filtered water reduces scale build-up significantly and extends time between descaling
Steam Wand Deep Clean
- Soak the steam wand tip in hot water with a small amount of cleaning powder for 20–30 minutes to dissolve baked-on milk
- Use a small pin or pipe cleaner to clear the steam holes if blocked
- Some wand tips unscrew for easier soaking