Baby oil 😊 that's called cradle cap, there head gets flaky. Just needs some moisture lol
My baby had that, when I bsthed him Id shampoo his hair with his soft brush and in like 2 bathes it came off. Also brush through his hair when it dry youll see all the flakes come out
Coconut oil fixed it for my daughter after one wash!!! Just rub it in, let it sit while you bathe him, wash it out and rinse with a fine baby comb....I had to wash again the next day cuz it was still greasy but the flakes went away!