If you have decent char cloth you should have a hard time putting it out, not keeping it lit. Just get some cotton t shirts and rip them up by hand. The stringier the better. Once you’ve gotten a decent size ball; put it in your metal container with a lid tightly on it. Poke a 1/16” size hole in the lid and put it down in your hot fire coals. Once it gets hot enough a candle flame will emerge from your pin hole, then it goes out. The flame turns into a stream of smoke. Watch carefully as when the smoke stream ends you must remove the container from the coals. You have just made grade A char cloth. Make sure not to open the container until it is cool to the touch, as introducing oxygen to hot char cloth will surely burn it up. Good luck!