This is the first I've ever heard of substrates getting stuck in noses...either coconut or aspen. Like someone else mentioned, I'd be worried that the mucus came first and the fibers stuck to the mucus, not the other way around.

That being said...what can you do NOW to help the situation?

Switch to a paper substrate, first and foremost. Paper towels, clean newsprint, or good ol' newspapers...whatever you choose, you can then be certain that no fibers are there to get stuck in noses and IF something else is going on, you'll have a chance to catch it without confusing the cause.

Second...a bath could help. Make sure the water is just lukewarm. (NOT warm to the touch...what feels "warm" to you will feel hot to the snake) The water should feel neither warm nor cold when you touch it with the inside of your wrist. Not too deep, but deep enough for her to dip her head under if she chooses to do so. Don't leave her unattended for a moment while bathing, but do keep in mind that they can hold their breath under water for a long time, so don't freak out if she dips her head under the water for more than a minute. If you do this in a bath tub, then make sure to clean and rinse the tub really well first to make sure there are no soap residues in the water. I'd recommend a large, clean tub with a lid, though.