2 Pcs Sock Diffuser for Hair Dryer, Soft Foam Universal Hot Sock Diffuser Attachment for Hair Dryer Reusable Travel Blow Dryer Accessories Compatible With Most Models

Just get a sock diffuser like this - they work amazing (better than expensive ones IMO) and are super inexpensive. I can typically only find them on Amazon and they last for years: Amazon.com: 2 Pcs Sock Diffuser for Hair Dryer, Soft Foam Universal Hot Sock Diffuser Attachment for Hair Dryer My hair is nearly the same texture as your daughters, and it will become frizzy after a few days if I don't "reset" the curls by completely wetting my hair and diffusing/styling it. I only shampoo a few times a week but wet my hair completely every day and restyle. Your daughter may be the same.