Here's what I found out, folks: apparently this thing has a mind of its own! I didn't get a refund (yet) but what I have discovered is that the green light stays on just slightly longer with the one Iclear 30. This is an indicator of something awry ( yes I heard that before, but I couldn't quite see why) so, the older ( by a couple of weeks) iclear 30's pin is just ever so slightly shorter - this did in fact cause firing not to occur. I had the vv in the correct spot, and everything was still south. So, after some tinkering, we got all regulated, I learned a couple of tips on the green light to watch for and all was bliss when I left the store. So, I had a few good puffs on the way home. I was told to never fill the tank ( I already knew that) while on the itaste, so with working newer Iclear 30 ( I bought it when I bought the mvp), I headed home. Removed it just l to add more juice- alas, square 1! Now it has a semi-full atty and I get 1 hit every 15 minutes or so. Green light lingers a bit, so that's not good. Took all clearos off, still getting longer green light. I also noticed that about 1 in 6 puffs is actually registering, even if I happen to get vapor. So getting the goods doesn't automatically insure a puff counter register. I'm just at a loss as to what should be done now. Any ideas? I like the hammer suggestion but it won't be effective on my habit. Lol.