I've tried many different wick materials. The original fiberglass that came with the iAtty, XC 116, silica, Ekowool, cotton yarn. Even though I still tinker with silica, I prefer cotton. Cotton wicks until the tank is empty, of all my wick materials it wicks the best. If it gunks up or burns up it continues to vape, just not as well. Its plentiful, easy to get, cheap. I can't dry burn, but I can change my wick painlessly for next to nothing. It doesn't make me cough like every thing else does. The fact that its organic, will burn if dry, but still vape like crazy if wet some how seems assuring that its less harmful if ingested microscopically. Every thing else sheds fibers and seems to be so impervious to heat, moisture, but yet its brittle and flaky. Cotton is much hardier and doesn't fall apart so easily. Jmho.
