How to Clean an Espresso Machine
Updated
Three routines on three schedules. After every session: purge and wipe the steam wand, knock out the puck, rinse the group. Weekly: backflush with water or rinse the brew group, and soak baskets and the portafilter. Monthly: backflush with detergent. Descaling is a separate job on its own schedule, set by your water rather than by the calendar.
Cleaning and descaling are different jobs
This is the distinction that causes the most confusion. Cleaning removes coffee oils from the brew path, using a detergent. Descaling removes mineral deposits from the water path, using an acid. They use different products, run on different schedules, and neither substitutes for the other.
Skipping cleaning makes the coffee taste bitter and stale. Skipping descaling eventually ends the machine.
After every session
Purge the steam wand and wipe it with a damp cloth. Dried milk in the tip is the most common cause of a wand that stops working.
Knock out the puck, wipe the basket, and run a short flush through the group to clear grounds from the screen.
Empty the drip tray when the float shows, and on a bean-to-cup machine empty the grounds container before it packs solid.
Weekly and monthly
On a portafilter machine with a three-way valve: backflush with water weekly and with detergent roughly monthly, using a blind basket. On a machine without that valve, remove and soak the shower screen instead, and scrub the group with a brush.
On a bean-to-cup machine: take the brew group out and rinse it under the tap weekly, if the manufacturer designed it to come out. Brush the grinder chute — stale oil there tastes like stale coffee no matter how fresh the hopper.
Soak baskets, the portafilter body and drip tray in a coffee-oil detergent solution monthly. Never put brass parts or a portafilter in a dishwasher: detergent strips the finish and pits the metal.
Milk systems: rinse a two-part carafe after every use; run the automatic cleaning cycle on any system with internal milk lines after every session, without exception.
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Frequently asked
- How often should I clean my espresso machine?
- Wipe the wand and rinse the group after every session, backflush or rinse the brew group weekly, run a detergent clean monthly, and descale every one to three months depending on water hardness.
- What is the difference between cleaning and descaling?
- Cleaning removes coffee oils from the brew path with a detergent. Descaling removes mineral scale from the water path with an acid. Different products, different schedules, neither replaces the other.
- Can I put espresso machine parts in the dishwasher?
- Only the parts the manufacturer lists — usually drip trays, grids and milk carafe components. Never portafilters, baskets or anything brass.
- What happens if I never clean the group head?
- Coffee oils go rancid in the shower screen and are extracted into every shot, producing a bitter, stale taste that survives changing beans.