I just bought some Rayon (cellulose) - from Sallys' Beauty Supplies. I have been testing this with 2 kfl's and a dripper, the Magma. It does have a sense of giving a purer flavor to me. My coils are not gunking up anywhere nearly as fast as my cotton was doing. it feels easier to work with, and I am stuffing my coils fairly tight with the stuff. What is with this stuff, it just wicks and wicks. It is kind of amazing that I am not scalding the wick at all when my juice gets low. It gives me the chance to detect the missing flavor notes as it wanes out of juice. So far I like it better than cotton and it happens to be cheap. Do other d.i.y.'ers feel the same way? We know we can be a picky bunch when we don't care for something in our vape.