Yes, I carry a patch of char cloth. It's not my primary tinder, but there packed with my fire starting kit as a backup in case I have to try to throw sparks off of rocks with my high carbon steel knife. It takes the smallest of sparks and starts an ember.

I prefer char cloth made from blue jeans versus a t-shirt because it's much beefier or at least thicker and stronger than some of the the budget t-shirts I've made char cloth from.

I usually just cut pieces of the jeans to fit in a non hinged Altoids tin and place it on the coals at the edge of the fire to make the char cloth.