Dishwasher leaves detergent tablet partially undissolved in the dispenser.

Safety first: Disconnect power before removing spray arms if accessing from underneath.

• Check loading: Ensure tall plates or pans are not blocking the dispenser door from opening fully.
• Clean upper spray arm: Remove and clean the upper spray arm, clearing all jets. Verify it spins freely.
• Water temperature: Run hot water at the sink before starting the dishwasher to ensure adequate initial temperature.
• Try powder or gel: As a test, use powder or gel detergent to see if dissolution improves. If tablets consistently fail, circulation or heating may be weak and require further diagnosis.

Proper spray coverage and temperature are essential for full tablet dissolution.