Clean your espresso machine daily and deep-clean it weekly to keep it working well and tasting good

An espresso machine needs cleaning in two ways: a quick rinse after each shot to clear out old coffee grounds, and a deeper clean once a week to remove the oils and residue that build up inside the group head, portafilter, and steam wand. If you skip the daily rinse, stale grounds will sit in the basket and turn bitter. If you skip the weekly deep clean, the machine will start pulling shots that taste flat or sour, and the steam wand will clog.

The good news is that neither task takes more than a few minutes once you know the steps. Most of the work is just running water or soaking parts in cleaning solution—nothing requires special skill or expensive tools.

Key Takeaways

  • Backflush the group head with water only (no portafilter) for five to ten seconds right after each shot to clear grounds from the shower screen.
  • Soak the portafilter and basket in hot water with espresso machine cleaning powder once a week for ten to fifteen minutes, then scrub with a soft brush.
  • Clean the steam wand when ready after steaming milk by purging steam, wiping with a damp cloth, and running steam again to clear the inside.
  • Descale the entire machine once a month using a commercial descaling solution and the machine's backflush or cleaning cycle.
  • Use only water or espresso machine cleaning powder—never vinegar or household cleaners, which can damage seals and gaskets.

The daily rinse: what to do right after pulling a shot

As soon as you pull a shot, remove the portafilter and tap the spent grounds into the trash. Do this while the machine is still hot—the heat helps loosen the puck. Then reattach the portafilter without the basket (empty) and run water through the group head for five to ten seconds. This is called backflushing, and it pushes water backward through the shower screen to clear any grounds stuck in the group head.

Stop the water, remove the portafilter, and wipe the shower screen with a clean, damp cloth. Look at the screen—it should be shiny and free of brown residue. If you see buildup, backflush again. This takes less than a minute and prevents old coffee from sitting in the group head and turning rancid.

Cleaning the portafilter and basket once a week

Once a week, soak the portafilter and basket in hot water mixed with espresso machine cleaning powder (such as Cafiza or Backflush). Use about one teaspoon of powder per cup of water. Let them soak for ten to fifteen minutes. Do not use vinegar or household cleaners—they can damage the rubber gaskets and seals inside the portafilter.

After soaking, use a soft brush (a toothbrush works) to scrub the basket, paying attention to the corners where grounds hide. Scrub the underside of the portafilter where it connects to the group head. Rinse both pieces under hot running water until the water runs clear and you smell no cleaning powder. Dry with a clean cloth and set aside.

While the portafilter soaks, take the shower screen out of the group head (it usually unscrews or pulls straight out—check your machine's manual). Soak it in the same cleaning solution for ten minutes, then scrub gently with the soft brush. Rinse and dry it, then screw it back in or press it back into place.

Cleaning the steam wand right after steaming milk

The steam wand must be cleaned when ready after steaming milk, while it is still hot. If milk dries inside the wand, it will clog and become very hard to clear. First, purge steam for two to three seconds by holding the steam knob open with no pitcher attached. This blows out any milk inside the wand.

Next, wipe the outside of the wand with a damp cloth or paper towel. Then hold a damp cloth around the tip and open the steam knob again for one to two seconds. This forces hot steam through the inside of the wand and pushes out any milk. Wipe the outside again. The wand should be clean and dry. If you see milk crusted on the tip, soak the tip in hot water for a minute, then wipe it clean.

Monthly descaling to clear mineral buildup

Once a month, descale your machine to remove mineral deposits from the boiler and internal pipes. These deposits come from minerals in tap water and make the machine heat unevenly and pull weak shots. Most machines come with a descaling cycle—check your manual for the exact steps, as they vary by model.

In general, you will fill the water tank with a commercial descaling solution (such as Durgol or the brand recommended in your manual), run the solution through the group head and steam wand into a bucket or sink, let it sit for ten to twenty minutes, then run fresh water through to rinse. This takes about thirty minutes total. Do not use vinegar, which can corrode metal parts inside the machine.

What to do if the group head or basket looks stained

Brown or black stains on the shower screen, basket, or inside the group head are normal and do not mean the machine is dirty. These are mineral and coffee oil deposits that do not affect the taste of your shots. You do not need to remove them, and scrubbing hard can scratch the metal.

If stains bother you, soak the removable parts (basket, shower screen, portafilter) in cleaning powder solution for fifteen to twenty minutes, then gently brush with a soft brush. For stains inside the group head that you cannot reach, backflush with cleaning powder solution once a week instead of water. Mix one teaspoon of cleaning powder with one cup of water, backflush for five seconds, then backflush with plain water five times to rinse completely.

Common mistakes that damage the machine

Never use vinegar to descale an espresso machine. Vinegar is acidic and can corrode the boiler, pipes, and seals. Always use a descaling solution made for espresso machines. Do not use household cleaners, bleach, or abrasive scrubbers on any part of the machine—they damage gaskets and leave chemical residue.

Do not backflush with the portafilter and basket attached. Backflushing with the basket in place can bend or crack it because water has nowhere to go. Always backflush with an empty portafilter. Also, do not let the steam wand sit with milk inside it. Even a few minutes of drying milk will clog the wand, and unclogging it is frustrating. Clean it when ready after steaming.

Frequently Asked Questions

How often should I backflush?

Backflush after every shot with water only. Once a week, backflush with cleaning powder solution mixed at one teaspoon powder per cup of water, then backflush five times with plain water to rinse. This removes the oils that build up in the group head.

Can I use a regular brush to clean the basket?

Use a soft brush like a toothbrush or a dedicated espresso brush. Hard-bristled brushes or wire brushes will scratch the basket and damage the finish. The basket does not need to be shiny—it just needs to be free of dried grounds.

What if my steam wand is already clogged?

Soak the wand tip in hot water mixed with cleaning powder for fifteen to twenty minutes to soften the dried milk. Then use a thin needle or a pipe cleaner to gently poke through the hole. Rinse under hot water. If it stays clogged, some machines let you unscrew the tip—check your manual.

Do I need to descale if I use filtered water?

Filtered water has fewer minerals, so you can descale less often—every two to three months instead of monthly. But you still need to descale at least once every few months, because some minerals always get through filters.

Is it normal for the group head to leak a little water?

A few drops when you remove the portafilter are normal. But if water streams out or leaks from the group head during a shot, the gasket may be worn and needs replacing. Check your manual for how to access and replace it.