This shows about how I hold it before applying a lighter. Just apply flame until you see it liquify/blacken, then pull melted portion into/through the cloth while sort of rolling your fingers holding the cloth. The end shown was created just this way. The tiny point could be clipped, but such narrowed "points" can be useful in their own right. And if you don't want to draw out the point, you just don't roll/pinch as much as it pulls through. I've made ends like that where it was more ball like, but the largest diameter was pretty much the cord diameter. And the "roll it" portion isn't really required unless really picky about the outcome. Pulling through the rag (I've used paper towel too) acts somewhat like a die, and even without undue effort it comes out good for 99% of my uses.