Thank you so much for replying, and for the suggestions. I don't shampoo my hair often at all, maybe once a week at the most. Instead I switched over to cowashing with my Tresemme Naturals.
That info about humectants is interesting-I didn't know glycerin caused frizz in dry climates. It's been so windy and disgustingly dry where I live lately so that could very well be the issue.