You should pull the solenoid and clean the debris, etc. from around the pintle, they have a tendency to get gunked up.
If it totally craps out you can cut the pintle off and screw the solenoid back in.
" But let me tell you something ,folks: You can't fix stupid!
There's not a pill you can take, there's not a class you can go to. Stupid is forever!"
" Pay no attention to that man behind the curtain!