olive oil or coconut oil works a treat with my little one. Someone told me that it has to be 'cold pressed' but it doesn't really matter. you just rub in a little oil then the cradle cap can be gently rubbed off.
Cradle cap, the common term for infantile seborrhea dermatitis, causes thick crusting and white or yellow scaly patches on a baby's scalp. Self-care measures, such as washing your baby's scalp daily with a mild shampoo, can help loosen cradle cap scales.
Methods for preventing cradle cap includes applying petroleum jelly, vegetable oil or a baking soda paste on the affected area and leaving it for some time can be helpful in removing the scale from the scalp.