Mineral scale can accumulate in coffee equipment depending on water composition, heating and use. Descaling addresses those deposits; detergent cleaning of coffee oils and milk-system cleaning are different maintenance tasks. CoffeeBox's guide focuses on citric acid, but that should not be read as permission to use a homemade solution in every coffee machine.
Manufacturers specify different products and procedures. For example, JURA instructs users to use its designated maintenance products, while some other machines permit particular citric-acid-based descalers. Follow the manual for the exact model, including concentration, filter handling, programme sequence and rinsing. Do not combine an acid descaler with other cleaners or improvise a stronger mixture.
Changes in flow or temperature do not prove that scale is the only fault, so persistent problems may need service. Use the machine's water and hardness guidance to plan maintenance, and keep a record of completed cycles. This overview replaces a universal recipe with model-specific care; it does not claim that any one acid is harmless to every material or machine design.
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