I have thin, fine, hair and always have. Get rid of her current products unless they are medicated for a reason. Get a small bottle of regular Prell and have her use that twice a week. Then, for the rest of the week, she should use Neutrogena Clean Volume Enhancing Shampoo. It's a tall, clear, greenish bottle-sleek looking. And IF, for some reason, she needs a detangler, get a "weightless" detangler. I have to order one online because I can't find it in the stores anymore. She should always moisturize her face with a light, fragrance free moisturizer after she cleanses. I use Curel but I'm old and although my face gets oily, there are now some dry spots. Sometimes, I wash my hair twice a day. I just do it in the sink. Sometimes, I just quickly wash my bangs for a touch up. Dry shampoo is not a good idea for fine, thin hair. Prell really strips the hair but it's also hard on your hair so that's why i said twice a week.