Dishes remain dirty; poor cleaning performance despite completing cycle

Safety first: Allow the dishwasher to cool before cleaning internal parts.

• Clean filters and spray arms: Remove and clean all filters and spray arms thoroughly as described earlier.
• Check water temperature: Open the door mid-cycle (carefully) to confirm water is hot. If lukewarm, investigate heater and NTC as in E3/E9.
• Use correct detergent: Use high-quality dishwasher detergent and ensure rinse aid and salt levels are correct for your water hardness.
• Load correctly: Avoid nesting dishes and blocking spray arms. Ensure water can reach all surfaces.
• Run cleaning cycle: Use a dishwasher cleaner to remove internal grease and limescale. If performance remains poor, the turbidity sensor or circulation pump may need replacement.