N.F.
I do not have any advice on the sunscreen thing, but I was wondering if you have seen a derm. I got spots on my skin and I do not use sunscreen, but it did happen when I was out in the sun. Have you tried putting the sunscreen on her when she is not in the sun at all just in the house. My derm said that because of so much chemicals that some water may affect my skin differently. We have a house on a lake and a pool, but when I go to the lake I get the spots. Then then chemicals that we use for the pool changed and I got spots in the pool as well. It is just a suggestion! Good Luck