Daily cleaning keeps your espresso machine running and your coffee tasting fresh
An espresso machine needs cleaning every time you use it—not once a week, but after each shot. Coffee oils build up inside the group head, portafilter, and basket within hours, turning bitter and rancid. Daily flushing takes three minutes. A deeper clean of removable parts takes ten. Neglect either one, and you'll taste the difference in your next cup, and your machine will wear out faster.
The good news: you don't need special tools or expensive chemicals. You need hot water, a brush, and a clean cloth. This guide walks you through what to do when ready after pulling a shot, what to do at the end of your day, and what to do once a week to keep everything running smoothly.
Key Takeaways
- Flush the group head with water for five seconds right after each shot, before the coffee dries inside the valve.
- Backflush the portafilter and basket with water only (no coffee) to clear oils from the shower screen and group head.
- Soak removable parts—portafilter, basket, shower screen—in hot water and espresso machine cleaner once a week to dissolve built-up oils.
- Wipe the steam wand with a damp cloth when ready after steaming milk, before milk dries inside the tip.
- Run water through the group head without the portafilter inserted at least once a day to clear the valve.
Flush the group head right after each shot
The moment you remove the portafilter after pulling a shot, insert it back into the group head empty and run water through for five seconds. This flushes out loose coffee grounds and oils before they harden. Do this before you even tamp your next shot.
If you wait until the end of the day, the coffee inside the group head valve will have dried and stuck. Five seconds of water now saves you scrubbing later. You'll see brown water come out—that's the coffee you're rinsing away.
Backflush the portafilter and basket daily
Backflushing pushes water backward through the basket and portafilter to clear oils from the shower screen and the group head valve. Insert the empty portafilter (no basket) into the group head and run water for one second, then stop. Repeat this on-off cycle five to ten times. You'll see water spray out around the portafilter seal—that's normal.
Now insert the basket into the portafilter (still empty, no coffee) and backflush again the same way for another five to ten cycles. This clears the basket and the underside of the shower screen. If your machine has a three-way solenoid valve, backflushing is safe and recommended. If you have a single-hole group head with no solenoid, check your manual—some machines should not be backflushed.
After backflushing, run the portafilter with the basket inserted under water from your sink or a pitcher to rinse away any remaining loose grounds. Tap the basket gently to shake out water, then wipe the portafilter dry with a clean cloth.
Wipe the steam wand when ready after steaming milk
Milk dries fast and sticks hard. The moment you finish steaming, turn off the steam and wipe the wand with a damp cloth—not a dry one. Get the tip and the sides. Then purge steam for two seconds to blow out any milk inside the tip.
At the end of your day, soak the wand tip (if it unscrews) in hot water for five minutes, then use a small brush or pipe cleaner to clear the inside. If the tip doesn't unscrew, run steam through for three seconds while holding a damp cloth around it to loosen any dried milk. Milk that hardens inside the steam tip will clog it and make future steaming uneven.
Soak removable parts once a week in espresso machine cleaner
Once a week, remove the portafilter, basket, and shower screen (if it unscrews). Fill a bowl or cup with hot water and add espresso machine cleaner powder—follow the amount on the package, usually one teaspoon per cup. Soak all three parts for fifteen to twenty minutes.
While they soak, use a small brush (a soft toothbrush works) to scrub the group head where the shower screen sits. You'll see brown residue come away—that's old coffee oil. Rinse the brush and scrub again until the water runs clear.
After soaking, scrub each part with the brush under running water. Pay attention to the underside of the shower screen and the basket holes—oils hide there. Rinse everything thoroughly under hot water until you smell no cleaner. Dry with a clean cloth and reassemble.
Run water through the group head without the portafilter
Once a day (usually at the end of your session), run water through the group head for ten seconds with nothing inserted. This clears the valve and any grounds stuck inside. You'll see water spray out—that's fine. This step is especially important if you've backflushed, because backflushing can push small grounds up into the valve.
After running water, insert the empty portafilter and run water again for five seconds to clear the shower screen area. This is your final rinse before you shut down for the day.
Deep clean the group head monthly
Once a month, remove the shower screen (if it unscrews—check your manual) and soak it in espresso machine cleaner for twenty minutes. While it soaks, use a small brush to scrub inside the group head where the screen sits. You may see a ring of brown buildup—that's mineral deposits and old oil.
After soaking, scrub the shower screen with a brush under hot water, paying special attention to the holes. Rinse until the water runs clear. Dry everything and reassemble. If your shower screen doesn't unscrew, skip this step and rely on your weekly soaking routine instead.
What not to do
Never use vinegar to clean an espresso machine. Vinegar is acidic and can damage the seals and internal parts. Use only espresso machine cleaner made for the job—brands like Cafiza are designed to dissolve coffee oils without harming your machine.
Never soak the portafilter or basket in cleaner for more than thirty minutes. Extended soaking can loosen the glue that holds the basket to the portafilter handle. Never use a wire brush on the shower screen or group head—you'll scratch the metal and create places where coffee can stick.
Never backflush with the basket inserted and coffee in it. Backflush only with an empty basket or no basket at all. Backflushing with coffee grounds can force them into the valve and jam it.
Frequently Asked Questions
How often should I backflush?
Backflush after every shot, or at least once a day if you pull multiple shots in a row. It takes thirty seconds and prevents oil buildup in the group head valve. If you skip backflushing for a week, the valve will start to stick and your machine will be harder to use.
Can I use regular dish soap to clean the portafilter?
Yes, dish soap and hot water work fine for the portafilter, basket, and shower screen on a daily basis. Espresso machine cleaner is stronger and dissolves oils better, so use it for your weekly soak. But dish soap won't hurt anything if that's what you have.
What if water leaks from the group head when I backflush?
A small amount of water around the portafilter seal is normal during backflushing. If water sprays everywhere or leaks from inside the machine, stop backflushing and check your manual—your machine may not have a solenoid valve designed for backflushing. If it does have one and the leak is new, the seal may be worn and need replacement.
How do I know if my steam wand is clogged?
If steam comes out unevenly or barely at all, the tip is clogged. Soak the tip in hot water for five minutes, then use a thin pipe cleaner or a needle to clear the hole. If the tip unscrews, soak it separately. Run steam for a few seconds to test. If it's still blocked, soak again and repeat.
Do I need to descale my espresso machine?
Descaling removes mineral buildup from inside the boiler and pipes, and depends on your water hardness. If you have soft water, descale every three months. If you have hard water, descale monthly. Use a descaling powder made for espresso machines and follow the instructions on the package. Descaling is different from the daily and weekly cleaning described here.