So, just when I thought I was getting the hang of using and refilling tanks, my 1st tank stopped working yesterday. After I did my daily refilling, I put it on the battery and nothing-no vapor. I got it to work a couple of brief times yesterday, but not at all today. I tried the paperclip up and down the airhole, but that didn't fix it. I'm thinking the cartomizer is broke? Is there a lifespan to these things? How long should I expect one to last? I think I had been using it about ten days. Luckily, my 2nd tank arrived yesterday and I filled it with no issues, and it's working fine I'm hoping the replacement cartos arrive at V4L soon! Is there something else I should try to get my 1st tank to work again or is it just dead?