Dear Diver freaks, here's some pics I took as I was rewicking a 1-week-old coil in my v2 which I use in my Billet Box. It's a 2.2 ohm coil using cotton ball.
Dry cotton passed through the coil. It is absolutely stuffed in there. When it gets primed, it will condense, so if you don't have enough cotton stuffed in there, when it condenses with juice, it won't make proper contact with Mrs. Coil, and you've just entered Dry Hit City, Jack. Notice that the cotton is pressed flat a bit, so it is wide and short. More on that in a bit.
Once you close her up and trim the wicks, this is what the slots should look like. You cannot see the inside of the Diver or the cup.
Open Diver heart surgery. Now, with the wick fully primed and compressed by the top tube, here's what it looks like.
Flat and wide, no gap between the coil and the cotton. Flat and wide is important: you get enough cotton feeding the coil, but it doesn't sit tall enough to get choked off when the top tube threads on. When you screw the top tube on, there should be little to no force required to thread it on. Don't force it shut. You either have too much cotton, or you did not thread it on properly.
Top view, because the Enezlis is a narcissist.
I can chain vape my BB with this 2.2 ohm coil at 4.5 volts (not even that high, I could easily run it at 4.75v and still be within my sweet spot) for drag after drag without getting any dry hits or any gurgling or flooding.
Gurgling only happens when my cotton is shot to Hades. Gurgling has become the perfect alert that it is time to change cotton. When it gurgles, I open up the Diver, and the cotton within the coil is a black lump, and comes apart easily.