Upper rack dishes remain dirty while lower rack is mostly clean.

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

• Clean upper spray arm: Remove the upper spray arm and flush under running water. Clear blocked jets with a toothpick.
• Inspect feed tube: Check the vertical feed tube and connection to the upper arm for cracks or dislodged seals. Reseat or replace as needed.
• Check rack height adjusters: Ensure the rack is correctly positioned and fully engaged with the water supply at the back wall.
• Assess pump performance: If both arms are clean but upper wash is still weak, the circulation pump may be underperforming and require replacement.

Proper water delivery to the upper rack is essential for even cleaning.