I was out of town the day one of my baristas got to an event without the portafilter. I found out from a customer on the phone, and by then the machine had been hot for an hour and had not made a single drink. Nothing was broken. The one part that turns an espresso machine into an espresso machine was sitting on a shelf forty minutes away.
Most of what goes wrong on a bar looks like that. Not a breakdown, a routine that did not happen. So here is the cleaning schedule I would stand behind for a commercial espresso machine, and the correction that comes with it: the thing that sets these intervals is not the calendar. It is how many shots go through the machine and how many groups it has to push them through. A bar pulling three hundred drinks a day and a church cafe pulling forty on a Sunday morning both get told to clean "daily," and only one of those schedules is right.
What has to happen at the end of every day?
Four things, on every group, every day the machine pulled shots.
- Backflush with detergent. Blind basket in the portafilter, a small measured dose of espresso machine detergent, run the group for about ten seconds and let it sit for ten, four or five times. Then repeat the whole cycle with no detergent until the water runs clear. The rinse is not optional and it is the step people drop first.
- Scrub the basket and the spouts. A group brush takes about twenty seconds per portafilter. Coffee oils go rancid on stainless, which is a thing we already tell every wholesale cafe account about their brewer, and it is more true of a portafilter that sits hot all day.
- Soak the baskets. Drop the loose baskets and the spouts into a detergent solution overnight. Keep the wooden or plastic handles out of it.
- Clean the steam wand properly. Purge and wipe after every drink during service, then at close, put the tip into a small jug of detergent solution and draw it up through the wand. Milk that dried inside a wand does not come out with a cloth, and it turns up in the next day's steamed milk as a smell before anyone tastes it.
That list is the floor. It does not scale with volume, because a machine that pulled ten shots today still has oil in the group and milk in the wand tonight. What scales is everything below it.
How often should you backflush with water alone?
During service, and on the group that is working hardest. A three-group bar rarely uses its three groups evenly; there is usually one that the person on bar reaches for without thinking, and that group is doing something closer to half the day's shots. A plain water backflush on it every fifty to a hundred shots takes five seconds and keeps the shower screen from packing.
Write it as a number of shots rather than as a time. "Mid-morning and mid-afternoon" means nothing on a Tuesday that never got busy, and it means far too little on a Saturday. If your machine counts shots, the counter is the schedule. If it does not, a mark on the day sheet each time somebody backflushes is enough.
When do gaskets, screens and baskets actually need changing?
Group gaskets announce themselves, which makes them the easy one. The portafilter handle creeps further round each month as the rubber compresses, and when it is sitting well past where it used to lock, or water is weeping around the edge during a shot, the gasket is done. On a busy bar that is a few times a year. On a quiet one it can be a year and a half. Replacing it on a calendar rather than on that symptom is how cafes end up changing good gaskets and living with bad ones.
Shower screens and baskets are the opposite. They degrade without a symptom you would notice, because the shot gets worse slowly enough that the bar adjusts the grinder instead. Perfect Daily Grind, writing up how a working bar handles it, records the interval one cafe runs: "every one to two months, her staff members change the shower screens and portafilter baskets." That is a real number from a real bar and I would not improve on it, but I would index it. One to two months at that cafe's volume is a count of shots, not a count of weeks, and a bar doing a third of the volume can run a screen three times as long.
The same article notes that they "drain the steam tank of their machine every six months." That one is closer to a true calendar item, because what accumulates in a steam boiler is arriving with the water rather than with the coffee.
Does a busier bar need a different schedule?
Yes, and the useful version of that answer is per group and per hundred shots rather than per machine and per day.
Group count is the part that gets skipped. A three-group machine has three gaskets, three screens, three dispersion blocks and three sets of baskets, and a cleaning list that says "backflush the machine" reliably gets one group done well and two done never. Our own store record for the espresso machine at Echo Coffee, the cafe we built with Echo Life Church and still run, carries the numbers that decide this: three groups, 58 mm baskets, installed in September 2025. Three groups is not a specification for the machine. It is a multiplier on every line of the schedule.
The practical version fits on one sheet of paper stuck to the wall beside the machine. Down the left, the jobs. Across the top, the groups, numbered. The daily rows get a box per group so it is visible when group three has been missed four nights running, and the consumable rows get a date rather than a tick, because "changed recently" is not a record and a date is. Whoever closes signs it. That is the whole system, and it works because it makes an omission look like an omission instead of like a clean machine.
Volume is the other multiplier, and it runs the same way for the grinder. We published the burr and water filter version of this a few days ago: replace them about every six months and stagger them, because volume is what wears them out and the calendar is only a proxy for it. The machine obeys the same rule, with one difference worth knowing: burrs give you no warning at all, and a group gasket gives you plenty.
What about a cafe that only opens on Sunday?
A Sunday-only bar has the opposite problem from a busy cafe, and it is most of the church work we do. The demand arrives in one ninety-minute block and then the room is quiet for six days, which means a busy cafe's list gets it wrong in both directions at once.
What it needs more of is the end-of-day routine, done properly on the one day it runs, because everything left in the machine sits there for six days rather than six hours. Milk in a wand overnight is a nuisance; milk in a wand until Friday is a smell you cannot get out. What it needs much less of is the consumables cycle. A screen that a daily bar changes in two months may be honest for a year on a Sunday bar, and a church that budgets for the busy-cafe interval is buying parts it does not need while a volunteer skips the wand.
The wand is where this bites hardest, because it is the one part a volunteer cleans and a volunteer rotates. A church bar staffed by a volunteer rotation has a different training problem from a cafe with three staff: the person who did it properly last month may not be the person doing it this month, and nobody is there on Tuesday to notice what was left. Write the wand routine on the machine itself rather than in a binder.
There is a third thing, and it is specific to a machine that sits: run it before the doors open rather than as the first person orders. Flush every group, pull a shot and throw it away, purge the wand. Water that has stood in a group for a week does not taste like water that has been moving.
If the coffee at your church comes out of urns rather than a machine, the urn version of this is a different routine and a shorter one.
What is not yours to clean?
Scale. Descaling a commercial espresso machine is not the same job as cleaning one, and on a plumbed machine with pressurized boilers it is not a job for whoever closed last night. The brewer side is different and we publish what that interval looks like; on an espresso machine, the honest instruction is to know your water, put a filter on it, and let a technician handle the boiler. What is in your water decides how fast this arrives, and it changes how the coffee tastes long before it changes how the machine runs.
Here is the concession. We are not your service company. We install brewers and perform maintenance when an account asks, arranged case by case, and it is not a standing service contract — which means if your machine goes down at nine on a Saturday, the person you need has parts in a van and it is not me. We do not hand accounts a written maintenance schedule either. I follow industry guidance on this rather than my own testing, and I have published it here as ours, because a schedule written down is worth more to a bar than a schedule I keep in my head.
I will also say what our own system cannot do yet. We model the equipment at the cafes we work with, down to the group size and the install date, and the one place that would hold the replacement interval for a given part on a given machine is sitting empty. Until somebody fills it, this article is first principles and not first-party, and I would rather say that than let a table imply a precision we have not earned.
What the schedule is actually for
None of this is difficult. It is twenty minutes at close and five seconds at a time during service, and the reason it gets skipped is never that a barista does not know how to backflush. It gets skipped because at the end of a long shift the machine still works, and a machine that still works is very good at making a case for tomorrow.
That is what the numbers are for. Not because the interval is sacred, but because a written interval is the only version of this that survives the shift where everybody is tired. I keep a checklist for the coffee cart now, and I check it twice before I leave, and the reason is a phone call I could not do anything about from three states away. A machine that is clean at nine on Sunday morning is a decision somebody made on Saturday night.
Questions we get about cleaning an espresso machine
How often should you backflush a commercial espresso machine?
Backflush with detergent once a day on every group, at close, on any day the machine pulled shots. Backflush with plain water during service on whichever group is doing the most work, roughly every fifty to a hundred shots. The detergent cycle is the one that does not scale with volume; the water cycle is the one that does.
Do you need to backflush with detergent every day?
Yes, on a commercial machine that ran that day. Espresso oils build in the group and in the three-way valve faster than people expect, and they are far easier to remove nightly than to remove in a batch. The step that actually gets skipped is not the detergent, it is the plain water cycles afterwards. Run those until the water is clear.
How do you know when a group gasket needs replacing?
Watch where the portafilter handle sits when it is locked in. As the rubber compresses, the handle travels further round, and a handle sitting well past its old position is a gasket at the end of its life. Water weeping around the edge of the portafilter during a shot is the same message arriving late.
Does a Sunday-only church cafe need the same cleaning schedule?
No, and the difference runs in both directions. The end-of-day routine matters more, because whatever is left in the machine sits there all week rather than overnight. The consumable cycle matters less, because screens, baskets and gaskets wear against shots pulled rather than against weeks on a calendar. Flush every group before the doors open.
Can a barista descale a commercial espresso machine?
Treat descaling a plumbed espresso machine as a technician's job rather than a closing task. It involves pressurized boilers and it is not the same work as cleaning the group. Filter the water going in, learn what your water is carrying, and put descaling on a service visit. A batch brewer is a different machine and a different answer.
Get your bar on a coffee that is worth the routine
Inheritance roasts to order every Wednesday in Pensacola and delivers free inside forty miles, and we do not publish a wholesale minimum because volume is part of the conversation before an account is approved. If you want the espresso side looked at as well as the coffee, say so when you apply — that is what the wholesale program for cafes is for, and how your bar is laid out decides more about your coffee than most people expect.
