I heart breast milk helps with that. When you bathe her add some in her bath water and pour it over her head. You can even add a small amount in her shampoo and gently massage her scalp
I use Now brand Virgin Coconut oil!!
Mustela sells cradle cap wash and cream and it cleared my baby's head after the second use!
Sounds like cradle cap and most babies get it at some point, Breast milk can help or coconut oil or baby oil!
So she has cradle cap? She could have that even when she is 1 put some coconut oil in her hair and use a very gentle baby brush in circular motion x do not pick it as it will make it really sore x