You can apply a mix of lavender and coconut oil. It reduces scalp infection and dandruff. Use this twice a week. I use lavender oil from Anveya. It's really amazing.

I would suggest Anveya peppermint oil which helps to reduce the dandruff directly apply on the scalp you can mix with coconut oil to

Use Anveya peppermint oil for dandruff it contains natural essentials which soothes the scalp and reduces the dandruff I have been personally using it and gives good results

How old is your baby??