99.99% of all cotton will expand... You must have gotten that .01% emus!!! Aren't you using either organic cotton or hemp in your setups now? I thought I read that somewhere. I have never used an organic anything... My head tells me if its good for you, it'll kill you sooner than later!!
@who... I agree with moody in that you have to have too much cotton in your coil. As he said as you are threading it through the coil you should have little to no resistance pulling it through. Even the most minor sticking point will choke off the coil and burn it in that spot.
@who...I also agree w/ moody that OP wick has too much cotton.
My cotton is the 99.99 percent.
I think I know whats going on.
The individual fibers could well be expanding.
My finished wick is very fluffy; can see daylight through it.
I suspect the fluffy wick sometimes sags under the weight of heavy liquid and become smaller even though individual fibers expanded.
It does wick quick; that's why I love it.