Ice cubes are very small, hollow, or melt quickly in the bin.

Safety first: Unplug the unit before cleaning internal surfaces.

• Adjust ice size: If your Klarstein model allows, select a larger ice size so the freeze cycle runs longer.
• Use cooler water: Fill the reservoir with cold tap water instead of warm. Avoid pre-chilled below 5°C to prevent sensor issues.
• Clean evaporator: Wipe the metal ice-making fingers or plate with a soft cloth and descaling solution to remove mineral film that insulates against cold.
• Improve room conditions: Move the unit to a cooler area away from direct sunlight and appliances that emit heat.

Consistently hollow or soft cubes after these steps may indicate weak refrigeration performance requiring professional diagnosis.