Hi all! I just got my first rba an a7 from avid. So far I like it but when taking a toot the coil pops! I can feel and hear it. If I take the top off press the button I see vapor and then second later POP you can see bits of niquid and vapor shoot off the coil! The pop is kind of loud and as I said you can feel it while taking a toot? Anybody have any idea why?