I came to this thread a little late, but I will reiterate what was said about fast fires resulting from thin fabric. However, if you need a fire to get warm or dry out, char made from thicker material works much better.
I prefer worn blue jeans torn into long strips, roughly 2" wide. Loosely roll the strip and place it in a container with a close fitting lid, with the requisite hole in the side of the lid/container.
Throw the container on hot coals raked from the fire. Roll it around and turn it on end periodically, until smoke is no longer emitted from the hole. Pull the container out of the coals and let it cool to the touch. Tear the char into whatever length you might need to ignite your tinder bundle.
If you are rendezvousing, smaller squares of char work ok. In the woods, in bad weather, larger pieces of char nearly insure a fire when you need it...provided you are properly prepared.