Daily cleaning keeps your DeLonghi running and tasting right

Clean your DeLonghi espresso machine every day you use it—this takes about five minutes and prevents old coffee oils from building up inside the group head and portafilter. The machine will pull shots faster, the espresso will taste cleaner, and you'll avoid the mineral scale that clogs the boiler and heating element over time. Most DeLonghi machines come with a cleaning brush and a blind basket (a portafilter basket with no holes), which you'll use for backflushing.

The daily routine has three parts: purge the group head, backflush with water, and soak the removable parts. You do not need special chemicals for this—just water and the tools that came with your machine. If you skip daily cleaning, you'll need a deeper soak with a commercial espresso machine cleaner like Cafiza or Backflush, which you can buy online or at a coffee supply store.

Key Takeaways

  • Purge the group head by running water through it without the portafilter attached, right after each shot, to flush out old grounds and oils.
  • Backflush by inserting the blind basket into the portafilter, locking it into the group head, and pressing the brew button for one second, then releasing—repeat five to ten times until water runs clear.
  • Soak the portafilter and basket in hot water for ten minutes after backflushing, then scrub with the cleaning brush and rinse thoroughly.
  • Descale the boiler and heating element every one to three months by running the descaling solution through the group head and steam wand, following your machine's manual for the exact steps.
  • Never soak the group head itself or use vinegar; use only water for daily cleaning and a commercial espresso machine descaler for mineral buildup.

Purge the group head right after each shot

Purging flushes out the loose grounds and oils left behind in the group head—the part where the portafilter locks in. Do this when ready after pulling a shot, while the machine is still hot and the group head is wet.

Remove the portafilter from the group head by twisting it counterclockwise. Press and hold the brew button (usually labeled with a coffee cup icon) for two to three seconds. Water will spray out of the group head. Stop when the water runs clear with no brown tint. This takes about ten seconds. You've now flushed out the old puck and oils that would otherwise harden and block water flow on your next shot.

Backflush with the blind basket five to ten times

Backflushing forces water backward through the group head to dislodge oils and fine grounds stuck in the shower screen and dispersion plate. You'll need the blind basket—a portafilter basket with no holes in the bottom—which came with your DeLonghi. If you've lost it, you can order a replacement from DeLonghi's parts website or a coffee equipment retailer.

Insert the blind basket into the portafilter and lock the portafilter into the group head as you normally would. Press the brew button for one second, then release when ready. You'll see water spray back out around the portafilter seal. Press and release again. Repeat this five to ten times until the water coming out is clear and no brown residue appears. The whole process takes about one minute. After backflushing, remove the portafilter and purge the group head one more time with water to clear any remaining debris.

Soak and scrub the portafilter and baskets

While the machine is still warm, remove the portafilter and both baskets (the single-shot and double-shot baskets). Fill a cup or small bowl with hot water from your tap—not boiling, just hot enough that you can hold your hand in it for a few seconds. Drop the portafilter and baskets into the water and let them soak for ten minutes. This softens the dried coffee oils so they rinse away easily.

After soaking, use the cleaning brush that came with your machine to scrub the inside of the portafilter and the underside of each basket. Pay special attention to the rim where the basket sits—oils collect there and can affect the seal. Rinse everything under running water until the water runs clear and you see no brown tint. Shake off excess water and set the parts on a clean cloth to dry. Do not put them in the dishwasher, as the heat can warp the rubber seals.

Descale the boiler and heating element every one to three months

Mineral scale from tap water builds up inside the boiler and heating element, slowing water flow and making the machine heat unevenly. How often you descale depends on your water hardness—if you have very hard water, descale monthly; if your water is soft, every three months is usually enough. You can test your water hardness with a test strip from a hardware store, or straightforward descale if you notice the machine is slower to heat or pull shots.

Buy a commercial espresso machine descaler—DeLonghi sells its own brand, or you can use Cafiza, Durgol, or another brand made for espresso machines. Do not use vinegar, as it can damage the internal seals and leave a taste in the machine. Follow the instructions on the descaler bottle, but the basic steps are: fill the water tank with the descaler solution mixed at the ratio the bottle specifies, run the solution through the group head into a cup until the tank is empty, let the machine sit for fifteen to twenty minutes, then refill the tank with fresh water and run it all through the group head and steam wand to rinse. Repeat the rinse cycle two more times with fresh water to remove all descaler residue.

Clean the steam wand after every milk drink

Milk dries and hardens on the steam wand faster than coffee does. Clean it when ready after steaming milk, before the milk sets.

Wipe the outside of the wand with a damp cloth while it's still warm. Then purge steam by pressing the steam button for two to three seconds—this forces out any milk inside the wand. Wipe again. If milk has dried inside the wand, soak the removable tip (if your DeLonghi's wand unscrews) in hot water for five minutes, then use a thin pipe cleaner or the cleaning needle that came with your machine to clear the hole. Rinse and wipe dry.

Deep clean with a soak when daily cleaning is not enough

If you skip daily cleaning for a few days, or if the machine starts pulling shots slowly even after backflushing, the group head needs a deeper soak. Remove the portafilter and both baskets. Fill a bowl with hot water and add a commercial espresso machine cleaner like Cafiza at the ratio on the bottle—usually one teaspoon per cup of water. Submerge the portafilter and baskets and let them soak for thirty minutes to one hour. Scrub with the cleaning brush, rinse thoroughly under running water, and dry completely before using the machine again.

For the group head itself, do not soak it—the group head is part of the machine and cannot be removed on most DeLonghi models. Instead, backflush with the blind basket ten to fifteen times, then run the cleaning solution through the group head by locking the blind basket in place, pressing the brew button for one second, releasing, and repeating. Do this five times, then purge with fresh water five times. This clears the oils without soaking.

Frequently Asked Questions

Can I use vinegar to descale my DeLonghi?

No. Vinegar can damage the rubber seals and gaskets inside the machine and leave a vinegar taste that lingers even after rinsing. Use only a commercial espresso machine descaler made for the job—brands like Durgol and Cafiza are safe for DeLonghi machines and cost about ten to fifteen dollars per bottle.

What if water leaks from the group head during backflushing?

A small amount of water around the portafilter seal is normal. If water sprays out heavily or the seal feels loose, the rubber gasket inside the portafilter may be worn. Check that the gasket is seated properly by removing the portafilter, inspecting the rubber ring, and reinstalling it. If it still leaks, the gasket may need replacement—DeLonghi sells replacement gaskets for about five dollars.

How do I know if my machine needs descaling?

The machine will pull shots more slowly than usual, take longer to heat up, or produce less steam. Some DeLonghi models have a descale light that turns on when minerals build up. If you have hard water, descale every month. If you have soft water, every three months is usually enough. You can also use a water hardness test strip to check your tap water.

Is it safe to soak the group head?

No. The group head is permanently attached to the machine and contains internal seals that can be damaged by prolonged soaking. Backflush and purge instead—these methods clean the group head without removing it or soaking it.

Can I put the portafilter in the dishwasher?

No. The heat of the dishwasher can warp the rubber gasket and damage the metal. Hand wash with hot water and the cleaning brush, then air dry on a cloth.