M.H.
Hi A.,
I'm going to go a different direction than the other ladies....Cradle cap is simply eczema of the scalp. This is a systemic issue so a topical "anything" just masks symptoms. Tea tree oil like Sonia said will help the symptom (and people are rarely allergic). Allergies are symptoms of a weak immune system...
Nutrition (mostly fruits and veggies) is a critical must. Detoxing will also help with the immune system and if you'd like some information on that, I'll be glad to help. Go to www.go2harmony.healthyhometour.com and just look around.
Hope I helped!
M.