After reading this thread, I'm starting to worry. I've had a lot of these things happen. First I had a little trouble with a short that was solved by taking everything apart and cleaning with a q-tip and isopropyl. BuzzKill gave me that advice. Then I got a wild hair to try a dual coil which I've never tried and killed two birds with one stone and tried a homemade syringe tank. I'd never tried that either. Since I bought the 510 cap as well as the 901 I got on it, I changed the cap out and tried it. NOTE if you're just trying something, use an adapter. I think I left my buzz sitting upright with that tank on it because later I found
juice on my batteries. I shoved a paper towel up there and got it as clean as I could. I can see the appeal of both the dual coils and the tank but, I missed my 901 atty. So I went to change back to the 901 cap and the terminal broke off the wire. It was tricky but, I managed to (sloppily) solder another wire on the end of the first one. After soldering the terminal on and putting everything back together, it's working fine.
After all that, I have one question and one complaint. Do I need to be doing anything else about that juice?
The complaint is that the buzz is so good that I'll go to this much trouble not to do without it long enough to send it back.