Mixing Vaseline with cotton and rolling it into small balls makes for surprisingly effective firestarter. Catches fire from almost everything (even flint and steel) and the burns with strong flame for like 2 minutes.
We put a cotton ball in the dogs' ears when giving them a bath to prevent water going in their ears, and we apply Vaseline to the exposed part of the cotton ball - makes the cotton ball waterproof. I thought you were describing that when I started reading your comment.