Quick answer: Clean a commercial espresso machine daily by backflushing each group with espresso machine detergent in a blind basket, soaking portafilters and baskets, purging and wiping steam wands after every drink, and wiping drip trays and gaskets. Weekly, deep-clean shower screens, soak steam tips and clean grinders. Monthly, inspect gaskets and water filtration. Always follow the manufacturer's instructions.
Key takeaways
- Daily backflush with detergent at close; water flushes between rushes.
- Purge and wipe the steam wand after every drink. Milk residue sets fast.
- Weekly: shower screens, steam tips, grinder cleaning.
- Monthly: gaskets, screens, water filter capacity. Book service before it breaks.
Why cleaning is a flavor issue, not just a hygiene issue
Coffee oils and fine grounds build up inside the group head, on the shower screen and in the valves. They go rancid, and every shot that passes through picks up that taste. A dirty machine makes dirty-tasting coffee, and the buildup is also one of the most common reasons machines need service.
The good news: most of it is a few minutes a day.
The daily routine (end of service)
1. Backflush every group
Espresso machine detergent dissolves coffee oils inside the group. Using a popular powder detergent as an example, the instructions for traditional machines are roughly:
- Insert a blind filter (solid basket) in the portafilter and add the detergent dose on the label, about half a teaspoon (3 g) per group for that product.
- Lock in the portafilter and run the brew cycle for about 10 seconds, stop for 10 seconds, and repeat five times.
- Remove the portafilter and rinse it under the group.
- Repeat the on-off cycle without detergent five times to flush.
- Pull and discard a shot before service to make sure no residue remains.
For commercial machines in regular use, this is typically a daily end-of-service step. Between rushes, a quick backflush with water only keeps grounds from building up.
Important: not all machines should be backflushed the same way, and some group designs or machines without a three-way valve shouldn't be backflushed at all. Follow your manufacturer's manual.
2. Soak portafilters and baskets
Remove baskets from portafilters and soak both in a detergent solution, following the product's mix ratio. One common espresso detergent lists 1 teaspoon per 32 oz of water for soaking. Avoid soaking portafilter handles or plastic parts unless the manufacturer allows it. Rinse thoroughly.
3. Brush the group gasket
With a group brush, scrub around the gasket and screen to remove grounds that a backflush can't reach.
4. Steam wands
- Purge and wipe after every drink with a dedicated damp cloth.
- At close, soak or wrap the tip with a milk-system cleaner per its instructions.
- Check that all tip holes are clear.
5. Drip tray, grate and exterior
Empty and wash the drip tray and grate. Wipe the exterior and the cup-warming tray.
6. Grinder hopper and chute
Brush out grinds from the chute and wipe the hopper. Coffee oils build up here too.
The weekly routine
| Task | Why |
|---|---|
| Remove and clean shower screens and dispersion screws | Oils and fines build up behind the screen |
| Deep soak steam tips | Prevents blocked holes and milk residue |
| Run grinder cleaning tablets or brush burrs per manufacturer | Removes rancid oils from burrs |
| Clean batch brewer sprayheads and brew baskets | Same oil buildup problem |
| Clean pitchers, rinsers and knock boxes thoroughly | Daily rinses miss buildup |
The monthly (or on-schedule) routine
| Task | Why |
|---|---|
| Inspect group gaskets and shower screens | Hardened gaskets leak; replace on your technician's schedule |
| Check water filter usage against its rated capacity | An exhausted filter lets scale or aggressive water through |
| Verify water quality (TDS, hardness) | Water can change seasonally |
| Check pump pressure and boiler temperature gauges | Drift affects extraction |
| Schedule preventive maintenance with your technician | Cheaper than an emergency call on a Saturday |
Water is the biggest long-term threat to a machine: hard water scales boilers, while overly treated water can be corrosive. The SCA's water table and filtration guidance address both risks. Descaling a commercial machine is usually a technician job, and good filtration means you'll need it less.
Your cleaning supply list
Keep these stocked so closing never stalls:
- Espresso machine detergent (powder or tablets)
- Blind baskets (one per group, plus a spare)
- Group head brushes and a long-handled cleaning brush
- Milk-system or steam wand cleaner
- Grinder cleaning tablets
- Color-coded bar towels (one color for steam wands only)
- Sanitizer and test strips for surfaces
- Spare group gaskets and shower screens
Add them to your par sheet alongside cups and lids. See our equipment checklist for the full opening list.
Make cleaning a checklist, not a memory test
Print a laminated daily and weekly checklist and post it by the machine. Initial and date each task. It's the easiest way to keep standards consistent across shifts, and it's a good habit for health inspections.
Keep your bar stocked with Affogato Bean
Clean equipment deserves great packaging. Affogato Bean keeps branded cups, lids, sleeves, napkins and pastry packaging on a recurring schedule with Affogato Reserve, and we can help source equipment as you grow. See products.
Always follow your equipment manufacturer's cleaning and maintenance instructions and the directions on your cleaning products.
Frequently asked questions
How often should you backflush a commercial espresso machine?
Commercial machines in regular use are typically backflushed with an espresso machine detergent daily, at the end of service, and flushed with plain water between rushes. Always follow your machine manufacturer's instructions, since some machines and group designs have specific requirements.
How do you backflush an espresso machine?
Insert a blind (solid) basket in the portafilter, add the dose of espresso machine detergent recommended by the product label, lock it in, and run the brew cycle in short on-off pulses. Then rinse the portafilter, repeat the pulses with no detergent to flush, and pull and discard a shot before service.
How do you clean a steam wand?
Purge the wand before and after every drink and wipe it immediately with a dedicated damp cloth. At day's end, soak or wrap the tip with a milk-system cleaner per the product instructions, and check the tip holes for blockages.
How often should espresso machine gaskets be replaced?
It depends on volume and heat exposure. Busy shops replace group gaskets and shower screens more often than low-volume ones. Inspect them regularly and replace them when they harden, crack or allow leaks around the portafilter, following your technician's schedule.
Sources
- Crema (retailer listing), “Urnex Cafiza Cleaning Powder — instructions for traditional espresso machines.”
- WebstaurantStore, “Urnex Cafiza 20 oz. Espresso Machine Cleaning Powder.”
- Ozone Coffee, “Urnex Cafiza2 Espresso Machine Cleaning Powder — FAQ.”
- Vixxo, “What Water Quality Does Coffee and Specialty Beverage Equipment Need?.”
Sources checked October 2026. Statistics are reported as published by each source.