If you can get your hands on some Koh Gen Do cotton, I highly suggest it.
I got mine from sephora.com. It's much easier to work with than the CVS sterile rolled cotton I've been using for the last year and it's claimed to be chemical free.
It's nice stuff and that 60 pad box will last a lifetime probably.
I store mine in a ziplock so the cotton stays fresh
Here's what the box says on the back:
I like a wicking media like cotton that I can thread thru the coil and adapt to the inside diameter of the coil
And if you like 30 ga, you will love 29 ga. I do.
Here's a little chart to show different resistances with 10 wrap micro coils :
Here's some micro coil 101 vids I made:
Making the coil:
http://youtu.be/bp8yqFojsEU
Mounting the coil:
http://youtu.be/Sd-ZiJel-jA
Wicking and vaping
http://youtu.be/BP_iwf_gTew
And if you wanna spend another 10-15 bucks, I highly suggest this artistic wire coil gizmo. It's all I use now. Makes perfect tension wrapped micro coils so easy
http://youtu.be/kNT5-s0U5jk