How to Descale and Clean Your Espresso Machine

By James Whitfield · 8 June 2026

Quick answer

Descaling and cleaning an espresso machine are two separate tasks. Descaling means removing the limescale deposited by water inside the internal circuit, using a suitable descaler; its frequency depends on water hardness, in practice every 1 to 3 months. Cleaning means backflushing and cleaning the group head and portafilter with a coffee detergent such as cafiza, generally once a week. Do not confuse the two: one acts inside the water circuit, the other on the parts in contact with coffee.

Key takeaways

Descaling and cleaning are two different tasks, not to be mixed up
Descaling = removing limescale from the circuit, frequency based on water hardness (1 to 3 months)
Cleaning = backflushing the group head with a coffee detergent such as cafiza, roughly once a week
Suitable descaler: citric acid or a dedicated product; vinegar is not recommended on many machines
Always rinse thoroughly after descaling

Descaling vs cleaning: two distinct tasks

Espresso machine maintenance: descaling and group head cleaning — Descaling and cleaning: two complementary parts of espresso machine maintenance.

The most common confusion among new machine owners is believing that descaling and cleaning are the same job. They are two separate tasks, targeting two different places and using two different products.

Descaling acts on the hidden interior of the machine: the reservoir, the lines, the pump and above all the boiler. Water gradually deposits limescale (calcium and magnesium carbonate) there. That scale reduces flow, throws off temperature and eventually damages the boiler. You dissolve it with a suitable descaler, citric-acid based or a product dedicated to your brand.

Cleaning acts on the parts in direct contact with coffee: the group head, the shower screen, the portafilter and the baskets. Coffee leaves oils there that turn rancid. You remove them by backflushing with a coffee detergent such as cafiza, and by soaking the accessories. No descaler cleans coffee oils, and no coffee detergent dissolves limescale: you genuinely need both.

Descaling, numbered steps

Descaling always follows the same four-stage logic. Allow about 45 minutes including the rinse, which is the most important part.

Empty and prepare. Switch off the machine, empty the reservoir and remove the portafilter. If a water softener filter sits in the reservoir, take it out: it would neutralise the descaler.
Prepare the descaling solution. Fill the reservoir with the solution dosed according to the manufacturer's manual. Use a suitable citric-acid descaler or a product dedicated to your brand. On many machines, vinegar is not recommended.
Run the solution through. Switch the machine on and run the solution through the group head, then the steam wand, in batches. Let it dwell between passes so the acid dissolves the limescale in the circuit and boiler.
Rinse thoroughly. Empty the reservoir, refill with fresh water and run several full reservoirs through the group head and steam wand, until there is no taste or smell of product left. This is the step most often rushed, and the most critical.

Group head cleaning (backflush) and accessories

Backflushing, or reverse rinsing, only applies to portafilter machines fitted with a solenoid valve (most pump machines). It forces water to flow back through the shower screen to flush out the coffee oils and residue built up upstream.

Proceed as follows: insert a blind filter (a solid basket, no holes) into the portafilter. For a simple rinse, start extraction for a few seconds then release, repeating several times. For a deep clean, add a small dose of a coffee detergent such as cafiza into the blind filter, repeat the cycles, then run several clean-water rinses with the blind filter to clear out any detergent residue.

For accessories: remove the baskets and portafilter, soak them in a coffee detergent solution, brush the shower screen and group gasket, and wipe the steam wand after every use. These short but regular habits keep the espresso aromatically clean.

How often should you descale and clean?

The two tasks do not share the same rhythm. Cleaning is weekly; descaling depends above all on water hardness.

Descaling by water hardness:

Soft water: every 4 to 6 months.
Moderately hard water: every 2 to 3 months.
Very hard or unfiltered water: roughly once a month.

Filtered or softened water clearly spaces descaling out and protects the boiler. If you do not know your water hardness, a slowing flow or an unstable temperature are clear signals.

Cleaning: a water-only group rinse every 1 to 2 days, and a detergent backflush roughly once a week depending on use. Soak the baskets and portafilter once a week too.

Mistakes to avoid

Using vinegar without checking. Vinegar is not recommended on many machines: it attacks certain seals and its lingering smell forces endless rinsing. Prefer a suitable descaler.
Skipping the rinse. A descale without a thorough rinse leaves an acidic taste and residue in the circuit. Run several reservoirs of clean water after any descale.
Confusing descaler and coffee detergent. Descaler does not clean coffee oils, coffee detergent does not dissolve limescale. Both tasks remain essential.
Backflushing a machine with no solenoid valve. Blind-filter backflushing does not suit every machine. Check the manual before fitting a blind filter.
Stretching descaling intervals in hard water. In a very hard water area, waiting six months lets scale settle in permanently. Match the frequency to your water, not to a fixed calendar.

Frequently asked questions

What is the difference between descaling and cleaning an espresso machine?

They are two separate tasks. Descaling removes limescale deposited by water inside the internal circuit and boiler, using a suitable descaler (citric acid or a dedicated product), every 1 to 3 months depending on water hardness. Cleaning covers the group head, portafilter and accessories: it is done by backflushing with a coffee detergent such as cafiza, generally once a week.

How often should you descale an espresso machine?

It depends on water hardness: every 4 to 6 months in soft water, every 2 to 3 months in moderately hard water, roughly once a month in very hard or unfiltered water. Filtered or softened water spaces descaling out. A slowing flow or unstable temperature should trigger a descale without delay.

Can you descale an espresso machine with vinegar?

Vinegar is not recommended on many machines: it can attack certain seals and components, and its lingering smell forces very long rinsing. Prefer a suitable citric-acid descaler or a dedicated product, following the manufacturer's dosage and your machine's manual.

What is backflushing and why is it necessary?

Backflushing is a reverse rinse of the group head with a blind filter, on portafilter machines fitted with a solenoid valve. A water-only rinse can be done every 1 to 2 days; a detergent backflush with a coffee detergent such as cafiza is generally done once a week to dissolve the coffee oils built up behind the shower screen. Without it, the oils go rancid and spoil the taste.