I'm looking for some recommendations for greasy hair, my twin DD's are 12 and both get super greasy hair only a day or 2 after washing. We've tried going longer between washes so to kind of train it but it's not helped, they wash with shampoo twice and don't put conditioner on their roots, only the ends of their hair and they use dry shampoo inbetween washes but we're it looks effective in my hair, it doesn't look like it does all that much for their hair. They have super fine hair so I think that's a contributing factor too. Any recommendations for a shampoo, conditioner or any other products? We have previously tried the L'Oréal Clay shampoo and conditioner but it made no difference. We've also tried shampoo and conditioners without SLS in.