Ah, glad my tip-off has been going well. I hadn't been alerted to any replies (as usual).
First off, Midnight - DO NOT be re-wicking/re-coiling stuff without a device that checks resistance! Secondly, cotton wool balls whittle down to something ridiculous like 0.01mm in thickness so there shouldn't be any reason you can't thread that through a coil with ease. The only issue I get is when that fine point tapers out and when you push it through the coil, it stops threading through by the time the taper gets thick. But usually the little fine point has juuuust made it to the other side and then you just pull with tweezers.
I then find you have to pull on both ends of the cotton wool, either side of the coil, to get it taught and then twist-and-pull to thread without causing the coil to lean over and get forced out of shape by the pulling/threading process.
Finally, you may find that using more than a small amount of cotton is counter-productive because the flavour/juice will dissipate and disperse though the wool and won't necessarily gather at the coil like with silica. I have mine just about dangle into the well where it meets a little puddle of juice to wick up. Or just keep dripping more frequently.
Anyone else find this? I basically started out with a tiny amount of wool, the thought, eff this! and put in a load. But then flavour dropped significantly.