I see this is an old thread, however I recently learned some info about this that may help. After experiencing some of my own hair difficulties, I learned that the intense heat in the studio opens the cuticle of the hair. The cuticle is responsible for hair strength. If you wish to wash your hair after class, first run it under the coldest water you can tolerate to close the cuticle. Warm water is not good for hot hair with an open cuticle. The other alternative to ice cold water is to not wash or wet your hair at all, let it cool down, and wash it a bit later. I learned this from my hair stylist who nearly had heart failure when she saw the condition of my hair. I take class 4 to 5 times a week so I was doing a number on my hair. Who knew? 🙂
Vicki