I'd put her and anyothers in a nice warm tub of water deep enough to float with supervision of course and just let them dive, dunk and play for about 10 minutes. Hopefully if something is stuck it will come out, could even be shavings if you use them. Make sure to put them in a nice warm place to dry out of drafts.
My duckling now no longer has the nose problems but now is breathing extremely fast with her mouth open.
