Cleaning the removable water tank is not the same as descaling the machine. One deals with an accessible container; the other sends a chemical through internal parts. Do not turn a simple reservoir wash into an improvised boiler treatment.
Check what is removable and washable
Switch off and unplug the machine as instructed, then let hot components cool before handling. Read the manual for the reservoir, lid, valves and any filter holder. Do not assume every plastic tank is dishwasher-safe or that a valve can be pulled apart.
Remove a cartridge only as directed. Filters have their own replacement and priming instructions; soaking one in cleaning liquid can damage it or leave unwanted residue. If the manual specifies water-only cleaning for a part, follow that instruction.
Wash the accessible surfaces gently
Empty old water. Use the method and cleaning product approved for the tank, with a soft tool where appropriate. Avoid abrasive pads that scratch the interior and make it harder to inspect. Pay attention to corners, the underside of the lid and the area around the outlet without damaging the seal.
Rinse thoroughly according to the instructions. If a detergent was permitted, do not refill until residues are removed. Never pour bleach, vinegar or another household chemical into the machine merely because it is available beside the sink.
Inspect before refilling
Check for cracks, an ill-fitting lid or a damaged seal. A leak after reseating the tank deserves attention before the machine is switched on. Dry the outside so you can distinguish a genuine leak from water left on the container during washing.
Refill with water that meets the machine's requirements, then seat the tank correctly. Follow any prescribed first-use or filter-priming routine. A newly fitted cartridge may need preparation before it supplies the machine.
Keep a modest maintenance record
Write down when the tank was cleaned and when the cartridge was replaced. Follow the manufacturer's schedule and inspect more often if the machine stands unused. A visible film or persistent smell is a reason to stop using the water and address the cause, not to mask it with fresh coffee.
If contamination or odour appears to involve internal tubing rather than just the reservoir, contact the manufacturer or service provider. Do not claim a tank wash sanitises an entire machine. Likewise, a clean tank does not prove that the water's mineral composition is suitable.
Keep these tasks separate on the cleaning list: reservoir care, cartridge replacement, group cleaning and internal descaling or service. The water-treatment guide helps with the water itself, not with replacing the service instructions.
