I would do olive oil! Apply and leave it 5-10 minutes And brush in circles. I do not recommend baby oil whatsoever. It causes the head to be extremely red and iterated.
Coconut oil works best. Rub it into her scalp and let it sit until it's bath time. Then use warm water and a baby comb/brush to scrape it off. It's better to let it sit so that the oils can soak into her skin which means you won't have to worry about doing it but so often if her skin stays moist. Also use coconut oil as a moisturizer!
baby oil and a baby brush... scrub the scalp after you apply baby oil... my son's was so bad it was like his entire head... but doing that twice and it's completely gone
Olive oil, let it soak into the scalp for about 5 minutes & then use a baby brush, brush in circles, then rinse. You could repeat if needed every couple of days/ 2 times a week until it's completely gone. Did the trick for my baby cousin.