I had a feeling she might be that type of plastic
The cloudiness also looks like it's deep within the plastic and not on the surface.
Hmm, are there any other ways to whiten or clearing up her plastic? I just very recently read about hydrogen peroxide baths but since she's a Brush 'n Grown I don't see that as an option because of the mechanism inside her. I'm not gonna venture into taking her apart, I'm just gonna ruin her.