So where do we get safe organics from EvilGrym?
I don't know where you can get cristal pure organics, may be grow it yourself on a space station...
First fiber i used was a bandage, sterille, from a dragstore. I don't know what bandages you have there, may be with some antiseptic - thats not one you need , the most simple bandage sterilized with x-rays. (it costs here about 0,3...0,5$) (but some users recommend to boil it anyway to wash away factory dust)
The next was white cotton yarn. Just boil it, changing water for several times.
People are actively using bamboo yarn & like it. i'm waiting for my one, but our post it The Legend.
Several people report about tail of lipton teabags. Good cotton, but you'll need a lot of teabags
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One man managed to vape even on a paper, but this was too cool, so that idea died.