Here's what I do at 6 v wig, open the tank a touch then unscrew the top for a few bubbles, rescrew the top and leave the tank open. When you get a dry hit dry hit it back, no button just hit. You'll hear a bit of bubbling and you're good without having to unscrew the top all the time. Works for me. Of course you could get an iatty and be done with feeding problems. I enjoy the UFS but Iatty is my number 1 vape.