Guide
How to Clean an Espresso Machine: Daily Care and Backflushing
Clean the basket, portafilter, group and steam wand, and learn when backflushing applies. Keep descaling separate and follow the approved process.
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Quick Answer
Start with the parts that touch coffee and milk: empty the basket, rinse the portafilter, clean the group and wipe and purge the steam wand using its normal cleaning routine. Run a backflush cycle only if your machine is designed for it. Descaling is a separate job for mineral deposits in the water path.
Choose the Cleaning Job
This guide focuses on home machines with a removable portafilter. If you have a bean-to-cup machine, use its brew-unit and milk-system procedures; it does not become a backflush machine because it makes espresso.
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| Part or job | What to remove | Cleaning route |
|---|---|---|
| Basket, portafilter and puck screen | Grounds and coffee residue | Rinse after use; use a compatible coffee cleaner when needed. |
| Group face and shower screen | Loose grounds and coffee residue | Clean the accessible surface and run the permitted rinse. |
| Steam wand | Milk on the outside and inside the tip | Use the specified wipe-and-purge routine; cool before removing a tip. |
| Backflush cycle | Coffee residue in a designed backflush path | Use the specified disc or blind basket, cleaner and cycle. |
| Descaling | Mineral deposits in the internal water path | Use the separate model-specific descaling process. |
Keep a dedicated damp wand cloth, soft brush and compatible cleaning product nearby. Use the wand cloth for milk cleanup and a separate cloth for the counter.
Clean the Basket, Portafilter and Puck Screen
- After brewing, wait for the machine’s pressure-release stage before unlocking the portafilter. Knock out the puck and remove the puck screen, if you use one.
- Rinse away loose grounds from the basket and coffee-contact parts of the portafilter. Brush accessible mesh or holes gently. Keep fingers clear of hot metal and water.
- For a deeper clean, let the parts cool and separate only the pieces designed for removal. Use a coffee-oil cleaner compatible with the basket, portafilter and any screen or coating.
- Prepare the labeled solution and soak only the permitted parts for the stated time. Keep a portafilter handle out of the solution unless its maker specifically permits immersion.
- Rinse as directed, check the basket holes and reassemble the portafilter. Dry the basket before adding your next dose.
A double-wall or pressurized basket has a restricted outlet that needs its own cleaning method. Use the supplied cleaning tool where specified rather than enlarging a hole with a drill or forcing a brush through it.
A quick rinse may remove loose grounds while leaving a brown film underneath the basket. Check that hidden area during deeper cleaning. Wash parts by hand unless their care instructions permit a dishwasher.
Clean the Group and Steam Wand
Use the machine’s ordinary group-rinse function to clear loose coffee, directing the water into the tray or a suitable container. Once the accessible group face is cool enough for cleaning, wipe away grounds and use a suitable brush around the seal. Switch off and unplug before removing any user-serviceable screen or part.
You do not need to unscrew a shower screen after every coffee. A rinse is routine care; removing a screen or gasket is a deeper task that depends on the design. Leave internal parts and unfamiliar fittings in place.
For the steam wand, wipe off milk before it dries and perform the maker’s brief purge with the tip directed into the tray or suitable container. Use the intended grip and keep your hand away from the hot tube and steam outlet. Breville’s Barista Express instructions use a damp wipe followed by a brief purge; follow the sequence supplied for your wand.
If steam holes remain blocked, turn steam off and let the machine and tip cool before using the supplied tool or removing a user-removable tip. Clean and refit it by its specified method. A milk-system cleaner is only appropriate where the maker permits it; do not put it into the water tank or substitute it for a backflush cleaner.
Empty and wash the drip tray and grounds container too. Rinse the milk pitcher after use and wash it properly rather than leaving milk residue for the next drink.
Backflush Only a Machine Designed for It
Backflushing sends water through a cleaning path designed into the machine while a blind basket or cleaning disc restricts the normal outlet. A pump, pressure gauge or removable portafilter alone does not establish that capability. Find a manufacturer backflush or cleaning-cycle instruction before fitting a blind basket.
The Breville Barista Express BES870 uses its supplied cleaning disc, a particular basket and a cleaning tablet for a programmed backflush cycle. The manual lists descaling separately. Use the accessories and cycle for your own machine.
- Confirm the specified basket or cleaning disc, approved cleaner and operating sequence for your machine. Fill the tank and empty the tray as the procedure requires.
- Fit the specified insert and measured cleaner. Lock the portafilter normally, then run the programmed cycle or stated pump-on and pump-off sequence.
- Wait for the cycle and pressure-release stage to finish before removing the portafilter. Clean the insert and basket, then complete the prescribed clean-water rinses.
- Remove the cleaning insert and restore the normal brewing basket. Complete any final discard-brew step that the approved procedure calls for.
Some makers also specify a clear-water backflush between detergent cleaning cycles. Follow that separate routine if it applies; a water-only cycle and a detergent cycle need not have the same schedule. Never improvise the cycle by loosening a pressurized portafilter.
Keep Descaling Separate
A backflush cleaner tackles coffee residue; a descaler tackles mineral buildup. Do not pour coffee-oil cleaning powder into the tank or put a citric-acid descaler into a blind basket as a substitute for the specified cleaner.
Use the machine’s separate descaling instructions, including the approved product, water-filter handling and rinse stages. Some machines require a particular service route, so a procedure from another boiler or model may be unsuitable. If the cup changes immediately afterward, start with bad taste after descaling.
If cleaning is complete but the original brewing problem remains, return to the relevant diagnosis: espresso running too slowly or bitter espresso. A persistent leak around the portafilter needs a seal and fit check rather than more detergent.
Frequently Asked Questions
Can I Wash a Bean-to-Cup Brew Unit with the Same Cleaner?
Only if that machine’s instructions specify it. Some removable brew units are rinsed with water alone. De’Longhi, for example, says not to use detergent on its removable infuser because it can remove needed lubrication. Use the machine’s shutdown and removal sequence before taking the brew unit out.