Safety first: Unplug the machine and depressurise the system.

Verify nozzles: Check that the correct Numatic nozzles are installed for your model. Replace any that appear oversized or non-original.
Inspect valve: Ensure the solution valve closes fully when the trigger is released. Service or replace if it leaks.
Adjust pressure: If your model has adjustable pump pressure, set it to the recommended level in the manual.
Review technique: Use intermittent trigger pulls rather than continuous spraying to conserve solution.

Solution tank level appears to drop very quickly compared to normal use.

Possible Causes