How to Clean and Descale a Commercial Coffee Machine
Last updated: July 2026
In 30 seconds:
- Backflush daily. Coffee oils turn rancid overnight and sour every shot pulled the next morning.
- Deep clean weekly. A 30-minute routine covers groups, portafilters, steam wands and the drip tray.
- Change the water filter or softener every 2 months. That is the real descaling job on an espresso machine.
- Never pour descaler into the machine yourself. The boiler is sealed. Scale removal inside it is an engineer’s job.
- Scale damage isn’t covered by warranty. Prevention costs pennies; a scaled boiler costs real money.
Espresso machines don’t die of old age. Most die of milk, coffee oil and limescale — all preventable in a few minutes a day. This guide gives coffee shop owners a simple cleaning and descaling routine for a commercial coffee machine, using kit that costs less than a single service call-out.
A daily backflush with espresso machine detergent is the accepted standard for keeping a commercial machine’s group heads clean. Add a weekly deep clean and a filter or softener change every 2 months. That combination is widely regarded as the routine that keeps a café machine pulling consistent shots for years — including the tank-fed Fracino Cherub (from £1,240). Running a dual-fuel (LPG + electric) machine in a catering van instead? Use our dual-fuel coffee machine cleaning and descaling guide — this page is for plug-in and plumb-in café machines.
Your cleaning schedule at a glance
| How often | What to do | Time |
|---|---|---|
| After every milk drink | Purge and wipe the steam wand | 10 seconds |
| Daily (close-down) | Backflush each group, empty the drip tray, wipe down | 5–10 minutes |
| Weekly | Full deep clean — the 7 steps below | About 30 minutes |
| Every 2 months | Change the water filter or softener | 10 minutes |
| Annually | Engineer service — boiler checked, scale dealt with professionally | Book it in |
What you’ll need
- Espresso machine cleaning powder or tablets (backflush detergent)
- A blind filter basket (the one with no holes — usually supplied with the machine)
- A group head brush
- Two clean microfibre cloths — one for steam wands only, one for the body
- A container for soaking portafilters and baskets
- Your replacement water filter or softener, dated so you know when it went in
Why the dedicated wand cloth? A cloth that’s wiped tables and counters carries bacteria straight onto the part that goes near steamed milk. Keep one cloth damp, clean and only for wands.
The daily close-down routine
Backflush each group. Fit the blind filter in the portafilter, add a dose of detergent, lock it in and run the group for 10 seconds. Release, then repeat four or five times. Finish with several clean-water flushes until no suds appear.
Purge and wipe the steam wands. Blast steam for two seconds to clear milk from the tip, then wipe the wand with its dedicated cloth. Dried milk blocks the tip holes and bakes on within hours.
Empty the drip tray and knock box. Rinse both under hot water. Old grounds and waste coffee water smell by morning and attract flies in summer.
That’s the whole daily job. Five to ten minutes at close, and the machine opens clean tomorrow. Your grinder needs a matching routine too — see our coffee grinders for coffee shops guide for the burr-care side.
The weekly deep clean — 7 steps, about 30 minutes
Pick a quiet evening. The machine can stay hot — most of this is safer and easier at working temperature, so take care around the groups and wands.
Step 1: Backflush every group with detergent
Run the full backflush cycle on each group, exactly as in the daily routine but with fresh detergent per group. Why: the weekly flush shifts oil the quick daily cycles leave behind.
Step 2: Scrub the group heads and gaskets
With the portafilter out, scrub the shower screen and the gasket groove with the group brush. Why: grounds packed into the gasket stop the portafilter sealing, causing leaks and channelling.
Step 3: Soak portafilters and baskets
Drop portafilters (metal parts only, not the handles) and baskets into hot water with a dose of detergent for 20 minutes, then rinse well. Why: stained baskets taint every espresso with old, bitter oil.
Step 4: Deep-clean the steam wands
Wipe the full length, purge, and check every hole in the tip sprays cleanly. If a hole is blocked, soak the tip in hot water and clear it with a pin. Why: a part-blocked tip stretches milk poorly and drags service times.
Step 5: Wash the drip tray and drain
Remove the tray and grille, wash both, and pour hot water down the drain box to clear coffee sludge. Why: the drain is the machine’s most common blockage point — and the smelliest.
Step 6: Wipe the body and check the tank
Polish the panels with a damp cloth. On tank-fed machines, empty the tank, rinse it and refill with fresh water. Why: standing tank water grows biofilm — a hygiene inspector will spot a slimy tank instantly.
Step 7: Check the water filter or softener date
Look at the date on the filter or softener. Past 2 months? Change it now, not “soon”. Why: this cartridge is the only thing standing between your boiler and limescale — which brings us to descaling.
Descaling a commercial coffee machine: prevention, not DIY
Here’s the part that surprises most café owners. You don’t routinely descale a commercial espresso machine the way you’d descale a kettle. The boiler is a sealed pressure vessel running up to 1.3 bar working pressure. Pouring supermarket descaler through it can strip debris into valves and pipework — and it voids goodwill fast if something fails afterwards.
The professional approach has two parts:
- Prevention — your job. A water softener or filter, changed every 2 months, stops scale forming in the first place. Fracino specifies the 2-month change for its commercial machines. Set a repeating calendar reminder; it’s a 10-minute task.
- Removal — the engineer’s job. If scale has already built up (poor steam, slow heat-up, kettling noises), book a service. An engineer can descale the boiler safely and check the elements and valves at the same time.
One more reason not to gamble: scale damage counts as neglect, not a fault, so it isn’t covered under warranty. Fracino warranty work is back-to-base — the machine goes to the workshop, with collection and return at your cost (roughly £95 out and £115 back, about £210 round trip) unless you drop it off yourself. The full detail is in our Fracino servicing and warranty guide. A £20-a-year filter habit is cheaper than any of that.
Tank-fed or plumb-in: where your scale risk comes from
Tank-fed machines (Fracino’s Cherub, Classico, Little Gem and Piccino) refill by hand from a 3-litre tank. Their filter sits in the tank — cheap, simple, and easy to forget. Rinse the tank weekly and date the filter.
Plumb-in machines (Bambino, Velocino, Contempo and Romano ranges) connect to the mains via a 15mm supply. They should have an inline softener fitted on installation. A two-group automatic like the Fracino Bambino 2 Group Automatic (from £2,380) can serve up to 400 cups an hour. At that flow rate, unsoftened hard water would scale it in months, not years.
Hard-water areas (most of southern and eastern England) make the 2-month change non-optional. Softer-water regions get more grace — but the cartridge still clogs with sediment, so change it on schedule anyway.
Five things never to do
- Never run domestic descaler through the machine. Sealed boiler, engineer job. See above.
- Never soak the portafilter handles. Hot detergent water wrecks the plastic and loosens the grip over time.
- Never use scouring pads on the body or wands. Scratches trap milk and coffee residue permanently.
- Never leave the blind filter in overnight with detergent. It sits in the group and corrodes the gasket.
- Never skip the rinse flushes after backflushing. Detergent residue in the first shots of the day tastes exactly as bad as you’d imagine.
Frequently asked questions
How often should a commercial coffee machine be cleaned?
Backflush the groups and clean the steam wands daily, deep clean weekly, and change the water filter or softener every 2 months. Wands should be purged and wiped after every milk drink. This routine takes 5–10 minutes a day and about 30 minutes once a week.
Can I descale a commercial espresso machine myself?
No — the boiler is a sealed vessel running up to 1.3 bar, so descaling it is an engineer’s job. Your job is prevention: a water softener or filter changed every 2 months stops scale forming. If steam power has already dropped, book a service rather than reaching for descaler.
What is backflushing on an espresso machine?
Backflushing forces water and detergent backwards through the group head using a blind filter — a basket with no holes. It dissolves the coffee oils that build up inside the group. Run it daily with espresso machine detergent, then flush with clean water until no suds remain.
How often should the water filter or softener be changed?
Every 2 months on a commercial machine — that’s Fracino’s specified interval for its filter and softener cartridges. In hard-water areas treat it as a fixed deadline. Date the cartridge when you fit it and set a repeating reminder, because a forgotten filter is how boilers scale up.
Why does my steam wand keep blocking?
Dried milk. If the wand isn’t purged and wiped straight after each use, milk bakes into the tip holes within hours. Purge for two seconds, wipe with a dedicated cloth, and soak the tip weekly. If one hole sprays sideways, soak it in hot water and clear it with a pin.
How long does a commercial coffee machine take to warm up?
Around 15 minutes from cold for a commercial espresso machine. Build that into your opening routine rather than pulling shots on a half-hot group. A machine that suddenly takes much longer to heat, or loses steam pressure mid-morning, is often showing early scale symptoms.
Is limescale damage covered by the warranty?
No. Scale is classed as preventable neglect, not a manufacturing fault. Fracino warranty repairs are back-to-base, with collection and return costing about £210 round trip unless you deliver the machine yourself. A filter or softener changed every 2 months is the cheap way to never have that conversation.
Do tank-fed machines need different care from plumb-in machines?
The routine is the same, plus one extra job: rinse and refill the tank weekly, because standing water grows biofilm. Tank-fed models like the Fracino Cherub use an in-tank filter; plumb-in machines use an inline softener. Both are changed every 2 months.
Keep the routine boring and the machine will stay exciting — fast steam, clean shots, no surprise repair bills. If you’re weighing up your next machine, the tank-fed Fracino Cherub and the plumb-in Bambino 2 Group ranges cover most UK café counters, and every machine we sell comes with the same advice you’ve just read.