have you taken the solenoid apart recently?
it sounds like it needs to be reset. Try, without air, turning the marker on with the eyes off and pulling the trigger at least 50 times.
Also, make sure your battery is a fresh name brand 9v. Energizer has given me the best results as far as consistency and longevity.
Last edited by Bloodymurder : 04-23-2011 at 08:03 PM.