I use White Cotton that I purchase from Joann's fabric, Michaels, Wal-mart, etc.
Cost: $2.59 to $4.00 - All are White 100% Cotton.
* Aunt Lydia's Crochet Thread SIZE 3
* Artistic Crochet Cotton SIZE 8
* Lily brand Sugar N Cream Yarn
* 100% cotton cosmetic rounds
Boil it before you use it. I boil it about 15 minutes and change the water a couple times. I find I much prefer the cotton over silica or fiberglass. Cotton brings out the flavor of juices. I have juices here that I vaped for a long time. The first time I had them with a cotton wick, it was amazing! I could not believe the difference in the taste. You need to let the cotton sit and wick for a bit before you start vaping, but it is well worth the wait.
Here is a thread that has quite a bit of info about cotton wicking material. You might find it helpful:
http://www.e-cigarette-forum.com/fo...355501-different-cottons-different-wicks.html
I tried bamboo. Was not for me.
I tried hemp. Was not for me.
ymmv- taste is subjective
Hope this helps a little,
Paula