Just repetition really, its not a perfect build but it is certainly working 100% better than any previous attempts. i couldn't get a microcoil and cotton build to wick well enough no matter how i placed the cotton wick, even with a higher pg liquid. I wonder if the threaded wick hole is maybe slightly smaller than the authentic kraken therefore the swelling of the cotton is causing an issue there. Now ive got my mesh stocks replenished i don't see the necessity to use cotton for the time being while im learning how to build on a genny, KISS i guess!