New to vaping, started less than a week ago after smoking cigs for about 9years. Buddy of mine recommended a nice device to start with, sigelei 50watt box mod with aspire nautilus tank setup. Half of the time when I go to puff, it makes the proper noise but no vapor is produced. It happens on the first puff sometimes after sitting for minutes and on the 2nd 3rd more often. But then it'll hit nicely for hours. Is it something I'm doing wrong or? Also it will occasionally spew juice up the drip tip and that's nasty lol.