Well, I tried to take it apart & could only get half of the screws out. I gave it a few blasts with dust buster spray & that seems to do the trick, but after ten minutes, it started sputtering again. So it looks like I'll have to get a new one. This old one was a Paasche D-500, which I've seen on Ebay for around $50, which isn't too bad given my budget. Anyone recommend another model within my price range?