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Clean a bean-to-cup machine to remove coffee and milk residue; descale it to remove mineral deposits from the water system. They are separate maintenance jobs, even when a machine combines them in one service programme. Use the cleaner, descaler, dose, filter procedure and display sequence specified for your exact model.
Start with your machine’s manual and on-screen prompt. The steps below explain the common workflow and show model-specific examples, but programme names, tablet locations, quantities and timings are not universal.
Cleaning and descaling remove different residues
“Cleaning” normally means removing coffee oils, grounds and milk residue from the brewing path, outlets and milk circuit. “Descaling” dissolves mineral scale formed by water inside the machine. A cleaning tablet is not a descaler, and a descaling product is not a substitute for milk-system cleaner.
| Maintenance job | What it addresses | Typical control on the machine | What determines the procedure |
|---|---|---|---|
| Coffee-system cleaning | Coffee oils, residue and deposits in the coffee circuit | A cleaning or tablet programme | Model instructions, tablet location and dose |
| Descaling | Mineral scale in water-carrying components | A descaling programme | Model instructions, water filter handling, descaler type and dose |
| Combined service | Coffee residue and scale in one guided cycle | A combined programme such as Calc’n Clean on some machines | The exact series and display prompts |
| Milk-system cleaning | Milk residue in the carafe, hose, frother and milk outlet | A milk-cleaning cycle or manual wash | The milk-system design and its dedicated product instructions |
Manufacturers document separate and combined programmes. Bosch’s support guidance covers cleaning, descaling and combined Calc’n Clean options across different series: Bosch cleaning and descaling guidance. Siemens likewise publishes model-specific descaling instructions for its EQ.500 range: Siemens EQ.500 descaling programme.
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Before starting any programme
Have the machine manual available, identify the exact model or series, and read the display message rather than selecting a cycle by guesswork. The same manufacturer can use different instructions for different ranges.
- Use only the coffee cleaner, descaler, milk cleaner and water-filter type specified or approved for that model.
- Check whether a water filter must be removed before descaling and reinstalled afterward.
- Make sure the machine is switched on, stable and cool enough to handle removable parts safely.
- Prepare a container large enough for the liquid the programme will discharge. The required capacity is model-specific.
- Keep the drip tray and grounds container available; the display may require them to be emptied before or during a cycle.
- Do not improvise a dose or put a tablet in a location that the manual does not name. Cleaning tablets, descaling tablets or liquid descaler can have different instructions.
If the display gives a maintenance prompt, use that prompt as the timing signal. The cited manufacturer pages do not establish one cleaning or descaling interval that applies to every bean-to-cup machine.
Routine cleaning between automatic programmes
Wipe fresh spills
Wipe coffee, milk and water from the housing and around the outlets as soon as practical. Dried residue is harder to remove and can be carried into later drinks. Use the cloth and cleaning method allowed by your manual; do not flood the controls or electrical openings.
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Empty the drip tray and grounds container when their indicators or display require it, then wash and rinse them as directed. Siemens’ EQ.6 plus daily-cleaning checklist includes these accessible parts and instructs users to remove coffee, milk, cleaning or descaling residues: Siemens EQ.6 plus daily cleaning checklist.
Rinse the coffee and hot-water outlets
Use the machine’s rinse function when provided, and follow any instruction to run water through the coffee or hot-water outlet after a service cycle. A rinse is not the same as a full cleaning or descaling programme; it clears loose residue and solution according to the model’s sequence.
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Clean the milk parts after milk drinks
Milk residue needs its own attention. Remove, rinse and clean the milk container, hose, connector, frother and outlet exactly as the manual shows. Some machines provide an automatic milk-cleaning cycle; others require disassembly and hand washing. A general coffee-tablet cycle does not automatically clean every milk component.
How to run the coffee-system cleaning programme
The following is an orientation, not a universal button sequence. The labels on your display and the manual for your model take precedence.
- Select the correct service. Open the maintenance or service menu and choose cleaning, coffee-system cleaning or the combined programme named by your manual. Bosch notes that programme names and steps vary among its 300, 500 and other series.
- Prepare the machine. Empty the drip tray and grounds container if the display requests it. Remove a water filter only when the manual says the cleaning programme requires that step; filter removal is more commonly specified as part of descaling.
- Load the approved cleaner. Put the specified cleaning tablet or product in the exact location shown on screen or in the manual. Do not assume that a descaling tablet belongs in the same compartment.
- Position the collection container. Place a container under the coffee and milk or hot-water outlets as instructed. Keep it in place until the display says the cycle is complete.
- Start and monitor the cycle. Press the confirmation control and follow every prompt. The machine may pause while you empty the container or tray, add water, or confirm a component has been refitted.
- Complete the rinse. Empty the discharged solution when prompted, rinse the tank and refill it with fresh water if instructed, then allow the machine to finish its rinse. Do not stop halfway simply because the water coming out looks clear.
- Wash the parts the programme does not cover. Clean the brewing unit, drip tray, grounds container and milk system according to their separate instructions. A completed tablet cycle is not proof that every removable part has been washed.
On machines that offer Calc’n Clean, the combined programme may handle coffee cleaning and descaling in one guided sequence. Follow the displayed product and filter instructions for that exact series rather than running an additional chemical cycle automatically.
How to descale a bean-to-cup machine
Descaling uses an acidic product approved for the machine to dissolve mineral scale. Because the product travels through water-carrying parts, the dose, tank level, filter position and final rinse are critical.
- Confirm that descaling is the selected service. Start from the maintenance menu or the machine’s descaling prompt. Do not insert a cleaning tablet simply because a service reminder is showing.
- Check the water filter instruction. Some programmes require the filter to be removed before descaling and reinstalled after the rinse. If your manual does not call for removal, do not invent a different sequence.
- Prepare the tank with the specified descaler. Use the approved product and the stated concentration. The quantity is model-specific; a dose documented for one series must not be copied to another.
- Empty the tray and grounds container if prompted. Descaling can produce several discharge and pause stages, so the machine may ask you to empty these parts before it begins.
- Place a suitably sized container under the outlets. Secure it so it will not overflow or be displaced while the pump runs.
- Run the complete programme. Follow the screen through solution discharge, pauses and any request to empty the container or tray.
- Rinse with fresh water. Empty and rinse the tank, refill it as directed, and allow the complete rinse stage to run. Reinstall the water filter only at the point specified by the manual.
- Wash away residual solution. Rinse removable parts and wipe any splashes before making a drink. If the machine still displays a service prompt, repeat only the recovery steps in its manual or contact the manufacturer’s support service.
Siemens EQ.500 example: use the figures only for that documented guidance
The Siemens EQ.500 support page gives a concrete example of how model-specific a descaling cycle can be. It calls for one descaling tablet dissolved in water filled to the tank’s 0.5-litre marking, a collection container of at least 1.0 litre, an approximately 19-minute descaling stage and an approximately 2-minute rinse stage. Those figures apply to the EQ.500 instructions on the cited page, not to bean-to-cup machines generally: Siemens EQ.500 descaling instructions.
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| EQ.500 instruction | Documented value | Qualification |
|---|---|---|
| Descaling product | One descaling tablet | For the EQ.500 guidance cited above |
| Tank preparation | Water filled to the 0.5-litre marking | For that model guidance |
| Collection container | At least 1.0 litre | Required by the EQ.500 procedure |
| Descaling stage | Approximately 19 minutes | Approximate time stated for EQ.500 |
| Rinse stage | Approximately 2 minutes | Approximate time stated for EQ.500 |
If your machine is not an EQ.500, use its own tank marking, product quantity, container size and estimated duration instead.
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Milk is a separate cleaning pathway, often with a carafe, silicone tube, connector, frother and dispensing nozzle. Disassemble only the parts your manual identifies, because hidden valves and seals can be model-specific.
- Remove the milk container and disconnect the milk hose or connector according to the manual.
- Empty leftover milk promptly; do not leave it in the carafe while the machine is idle.
- Rinse the container and removable milk parts, then run the machine’s milk-cleaning programme if one is available.
- Use the approved milk-system cleaner at the stated dose and in the stated location. It is not interchangeable with a coffee-system tablet or descaler.
- Run the complete rinse, then allow parts to dry as directed before reassembly.
A De’Longhi bean-to-cup manual documents separate cleaning, descaling and milk-carafe maintenance rather than treating the milk circuit as automatically cleaned by every other programme: De’Longhi bean-to-cup manual. WMF’s Peak 50 support information likewise lists separate coffee-system tablets, milk-system cleaner and liquid descaler: WMF Peak 50 care products.
Cleaning the brewing unit and removable parts
The brewing unit is where ground coffee is dosed and compressed. Some machines let you remove it for rinsing; others specify a different service method. Never force a unit out while the drive is in the wrong position.
- Read the manual’s removal and refitting sequence before opening the service door.
- Rinse or wash the brewing unit only in the way the manual permits; avoid adding unapproved detergent to a part that is meant to be rinsed with water.
- Clear loose grounds from the compartment and seals with the recommended method.
- Allow washed parts to dry or refit them immediately only if the instructions permit it.
- Confirm that the door, tray and brewing unit are fully seated before starting a drink or service cycle.
Cleaning tablets and automatic programmes can address internal coffee paths, but they do not remove every loose ground from the service compartment or replace inspection of accessible parts.
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Choosing the right maintenance product
When buying supplies, match the product to the exact make, model and programme. Product category alone is not enough: two machines may both use “tablets” but require different tablet types, locations or quantities.
| Product category | Use | Check before purchase | Evidence of separate category |
|---|---|---|---|
| Coffee-system cleaning tablet | Removes coffee residue during the machine’s cleaning programme | Model approval, tablet size, insertion point and dose | Bosch and Siemens programme guidance; WMF lists coffee-system tablets |
| Descaler | Dissolves mineral scale in the water circuit | Approved formula, concentration, tank level, filter removal and rinse sequence | Siemens documents a model-specific tablet procedure; WMF lists liquid descaler |
| Milk-system cleaner | Cleans the milk container, hose and milk path | Compatibility with the carafe or frother and the required rinse | WMF lists a separate milk-system cleaner; the De’Longhi manual gives milk-carafe care |
| Replacement water filter | Filters incoming water when the machine supports one | Exact filter type and the programme’s removal/reinstallation instruction | Siemens descaling guidance addresses filter handling |
Search terms such as “automatic coffee machine cleaning tablets” describe a product category, not a universal standard. Confirm compatibility on the manufacturer’s support page or in the manual before ordering.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How often should you clean or descale?
There is no single schedule supported for every bean-to-cup machine in the manufacturer instructions cited here. Use the machine’s prompt, water-filter status and manual. A machine in one region, with one water hardness and one drink volume, can call for service at a different time from another model.
- After milk use: perform the milk rinse or cleaning procedure specified by the machine.
- As indicators require: empty and wash the drip tray and grounds container.
- When prompted: run the coffee cleaning, descaling or combined programme completely.
- After a service cycle: complete the stated rinse and wash any parts the programme excludes.
Do not postpone a descaling prompt by substituting a rinse, and do not run repeated chemical cycles in an attempt to create a schedule that the manual does not state.
Common mistakes and how to recover
The wrong product was selected
Stop before starting the cycle and check the programme name. A coffee cleaning tablet, descaler and milk cleaner serve different circuits. If an unapproved product has already been added, follow the model’s instructions for emptying, rinsing and contacting support rather than guessing at a neutralising treatment.
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The programme stops and asks for a container or tray
Empty the requested container, refit it fully and press the display confirmation. Check the required capacity in the manual; the EQ.500 example requires at least 1.0 litre, but another model may specify a different size.
The machine asks about a filter
Do exactly what the display says for that stage. Some descaling procedures require filter removal before the solution runs and reinstallation after rinsing. Do not leave a filter out permanently unless the manual tells you to.
The service prompt remains after the cycle
Verify that the entire cycle and final rinse completed, that the tank and tray are seated, and that no display step was skipped. Then consult the exact model’s troubleshooting instructions; do not restart with a larger dose.
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Run the dedicated milk-cleaning process and inspect the hose, connector, frother and outlet for parts the coffee cleaning programme does not cover. Follow the manual’s disassembly limits and cleaner dose.
The machine has no automatic programme
Use the manual’s manual-cleaning sequence for the brewing unit, outlets, milk system and water circuit. The absence of a named automatic cycle does not authorize transferring another model’s tablet location or timing.
Quick Recap
Final pre-use checklist
- You selected cleaning, descaling or a combined service that matches the display prompt.
- The product is approved for the exact model and was measured as instructed.
- The water-filter position matches the programme instructions.
- The drip tray, grounds container and collection container are correctly positioned.
- The complete cycle, including its rinse, has finished.
- Milk parts and the brewing unit have received their separate required care.
- No cleaning or descaling residue remains on accessible surfaces or in removable containers.
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