so even with eyes off the firing is still intermittant (sp?) ?hav dried fired basically same affect as with paint
if that's the case then it is not your eyes that are the problem - one thing to take off the list of possible culprits.
would recommend you try my suggestion, making sure that it is a brand spanking shiny new high quality battery (read: duracell procell).
also, is there any sign of any internal leaks when you gas it up?
how much lube (and what type) did you use, and where did you put it?