I used olive oil. After applying it, you have to wait 10-15 minutes before combing it off, the oil softens the scab. It takes 1- 2 weeks to remove all. My mom and doctor both said, if you don't remove it, it makes baby's head itchy, if he/she scratches it, open wound can lead to infection. After you remove it, the hair grows nicer. My son's hair is now growing well
But once my baby's scab all fell off, he never scratch his head again! Like I said, it takes some days to remove all, give a bit more patience, I think your baby will be more comfortable. Does he need mittens to prevent him from scratch his head too much?