My standard setup on the GTUS has been 400 mesh with 4 or 5 wraps. I removed the ptfe spacer, so the wick is pretty thick. This setup has worked incredibly well. I then decided to try 325 mesh, as I have read it will increase throat hit (and I'm a fiddler by nature). I set up a 325 wick just like my 400 wicks, oxidized, and wrapped 5 wraps with no shorts. I tried to vape it and it was burning so hot that it was unvapable (burning the liquid, basically). I fiddled with it for about 2 hours, with 3 separate wick attempts, all with the same result. Finally, I added two wraps to the coil, for a total of 7, and it works perfectly. It seems to perform pretty much the same as 400 mesh with 5 wraps. I don't recall reading anywhere that a lower mesh number would require more wraps, so I'm a little surprised by all of this. Anyone have any thoughts or comments on any of this? Just trying to learn a little bit.
EDIT: By the way, after about 5 days use, I have not gotten even one dry hit with the 325 mesh and 7 wraps. Actually, I don't think I've gotten a dry hit since taking out the PTFE spacer and widening the wick (using both 400 and 325 mesh).