Dishwasher top rack does not clean well; bottom rack is clean but upper items remain dirty.

Safety first: Switch off power before removing racks or spray arms.

• Clean upper spray arm: Remove the upper spray arm and flush it thoroughly, clearing all jets.
• Check feed tube connection: Ensure the upper rack feed tube properly engages with the rear water supply port when the rack is pushed in. Adjust rack height or position if needed.
• Inspect seals: Check the rubber seal where the feed tube meets the rear wall for damage or missing parts. Replace if worn.
• Verify circulation strength: If upper cleaning remains weak, the circulation pump may be underperforming and should be tested.