Ody, fungus is a real pain! You need to shower Claire with Malaseb religiously, about 3 times a week. In short, do it until the skin is fungus free. You can also try to expose Claire under the sun for a good ten minutes few times a week. The place where Claire stays must also be kept super clean.

Let us know her progress and please post the latest pictrues of hers.
Good luck!