You can use a wooden toothpick or small tweezers to clean out her nares. You can use a baby wet-wipe or a Boogie Wipe (saline wipe) - really a thin wet fabric that won't tear is what you need if you want to wipe the area after the gunk is out. You can fold that over the end of the toothpick after you moisten it with clean water. Blunt the toothpick first, and wrap her in a bath towel and maybe have someone help you hold her so she doesn't squirm. You'll need to firmly hold her head. She'll hate it, but breathing is a priority, so I'd do it anyway.
Sometimes if you give them a dog bowl to drink out of they'll clean their nares on their own. I give water in a dog bowl periodically because normally they get a horizontal nipple waterer, and it helps them keep their beak and nares clean if they drink from a dog bowl occasionally.
Good luck!