The machine displays 'Descale' or a similar message very frequently, even after descaling.

Safety first: Follow the descaling instructions exactly as in the Grundig manual.

• Repeat descaling: Run the full descaling program from start to finish without interruption.
• Use correct descaler: Use a Grundig-approved descaling agent at the recommended concentration.
• Reset indicator (if allowed): Some models allow manual reset of the descale indicator via the menu.
• Use filtered water: Install a water filter (if supported) or use filtered water to reduce scale buildup.