I've had the same experience with it, tried to wik it multiple times and tried different coil heights, just can't get a decent vape out of it.I've got one that I won on here.
I'm buggered to hell if I can get it to work at all... I've tried like 4 styles of coils and wicked it well over a million different ways (that last one may be a very slight exaggeration). There's a few "how to wick" it on the tube, tried them all.
I don't want to give up on it, but it's in the cupboard right now and seriously considering whether to re-comp it - I'm back dripping because that just works.
i found its more prone to flooding than dry hitting.
maybe try with ends of your cotton floating closer to the juice hole than base of the deck?I found exactly the opposite whatever I do. Lots of cotton, just barely enough to keep contact with the coil, a fair few in between - and 2mm, 2.5mm, 3 & 3.5mm coils.
In fact, I've had to remove a seal to stop it drying out and I'm considering drilling a breather in the cap too to keep the wick wet.
It's nearly reliable now, enough cotton tails to just touch the base right through the juice holes, a removed seal and low wattage (22.5w on a 0.55ohm coil right now) and it's just about keeping up. Mostly.
What ratio juice are you using?