Hey there, sorry to hear about your DD's troubles...
One thing she could try (that only takes a few minutes of prep) is to keep 1 or 2 gallon jugs in the bathroom, fill them up with water and leave them overnight (this allows the chlorine to evaporate) and use those to wash her hair with. It's what I have to do when they over-chlorinate my water, and it's pretty easy.
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