I use 100% organic, unbleached cotton. It only cost me $1.50 for the ball, so it's probably the cheapest wicking material. I never boil mine, though I probably should. Taste isn't really affected by the cotton, but the burning is awful! Do not dry burn though, made that mistake on my first coil. But, as long as you keep the wick wet, it vapes beautifully. I know mine has a tendency to let the newest flavor take over. I can be vaping watermelon one second, drip some root beer on, then drip pomegranate, then go back to watermelon without a single cross, as long as the bowl is empty before I add the new flavor.