Dishwasher runs but dishes come out dirty, with food residues and film on glasses.

Safety: Turn off power before removing spray arms if accessing from below.

Steps:

• Clean filters: Remove and thoroughly clean all filters and the sump area.
• Clean spray arms: Remove upper and lower spray arms. Rinse under hot water and use a toothpick to clear blocked jets.
• Check loading: Ensure dishes are not blocking spray arm rotation and that large items do not shield smaller ones.
• Use correct detergent: Use high-quality dishwasher detergent and rinse aid. Avoid overfilling the dispenser.
• Run hot program: Run an intensive or machine care program to clear internal residues.
• Further checks: If performance remains poor, inspect water level and circulation pump as described in E08/E20 scenarios.