Guest breakfast is at 08:00. It is 06:45, the saloon is silent, and the machine has been off overnight. What you do in the next forty-five minutes determines whether the first cappuccino of the charter is excellent or embarrassing — and whether this machine survives the season.
Why Cleaning Is Not Optional
Coffee oils are fats: they oxidise, go rancid and coat everything. A dirty group head makes every shot taste bitter and stale. A dirty steam wand is a food safety issue — milk residue in a warm wand is a bacterial growth medium.
Daily Cleaning
| Task | Frequency |
|---|---|
| Purge and wipe steam wand | Before and after every single use |
| Wipe and purge group head between shots | Every shot |
| Knock out puck, rinse portafilter | Every shot |
| Backflush with water | Several times during service |
| Backflush with detergent | Daily at close |
| Soak portafilters, baskets, spouts in cleaner | Daily at close |
| Brush group head and shower screen | Daily at close |
| Empty and clean drip tray | Daily |
| Wipe hopper, brush grinder chute | Daily |
| Deep clean grinder burrs | Weekly, or per manufacturer |
| Descale | Per manufacturer / water hardness |
Backflushing
Backflushing forces water backwards through the group to clear the solenoid valve and the shower screen. It requires a blind (blank) basket — no holes.
- Water backflush: blind basket in, run the group for ~10 seconds, stop, repeat 3-5 times.
- Detergent backflush: a small measured dose of espresso machine cleaner (follow the manufacturer's dose) in the blind basket. Run, pause, repeat several cycles. Then rinse thoroughly: repeat with water only, at least 5-10 cycles, until no foam or residue remains.
- Never backflush a machine that is not designed for it. Single boiler machines without a three-way solenoid valve can be damaged. Read the manual.
- Always purge and discard the first shot after any detergent cleaning. Detergent in a guest's cup is a serious incident.
Descaling
- Descaling dissolves calcium carbonate with an acid. It is not cleaning, and cleaner is not descaler.
- Frequency depends on water hardness and use — with well-filtered water it may be rare; with untreated hard water it may be needed every few months.
- Many commercial boiler manufacturers advise descaling be done by a technician: dislodged scale can block valves and acid can damage components. Follow the manual, and involve the engineer.
- Prevention through correct filtration always beats descaling.
Daily Open and Close
Open
- Switch on, allow full warm-up (a commercial machine may need 20-45 minutes to reach thermal stability; the light coming on is not the same as being ready).
- Flush each group, purge the steam wand and hot water tap.
- Check water supply, drain, filter status.
- Purge the grinder, weigh a dose, pull and taste a test shot, re-dial as needed.
- Warm the cups. Check milk stock and dates.
Close
- Detergent backflush and rinse; soak portafilters and baskets.
- Brush the group, clean the wand and its tip hole.
- Empty and wash the drip tray; wipe the machine down.
- Discard opened milk per your food safety policy.
Onboard Notes
- Never pour espresso machine cleaner into anything that is not the blind basket.
- Under way, secure loose portafilters, tampers and knock boxes. A steel portafilter becomes a projectile in a beam sea.
- Log cleaning and any faults in the interior handover.