Does it look like it's on the surface, like an oil or some liquid got on her eye, or does it seem to be on the inside of her eye? From the pictures it looks like maybe she brushed her eye against an oil of some sort, I know I had to (gently) wipe my pastels eye because he had little coconut fiber specks on it for like a week....Something to thing of. Have you tried letting her slither through a damp towel??