Excessive spotting or filming on glassware after final rinse.

Safety first: Turn off power and allow the machine to cool before handling rinse components.

• Check rinse aid supply: Verify that the rinse aid container is full and the pickup tube is properly positioned. Prime the rinse aid pump to remove air.
• Clean rinse arms and jets: Remove rinse arms and soak in descaling solution. Clear each jet opening to ensure even spray coverage.
• Verify rinse temperature: Use a thermometer to confirm that final rinse temperature meets Insinger’s sanitizing spec. If low, troubleshoot the booster heater as described in heating-related entries.
• Address water hardness: If water is very hard, consider installing or servicing a water softener. Hard water can cause persistent spotting even with proper rinse aid.