How is everything about the situation on your smelly scalp?
I hope you solved it already, if not, I will share the accidental solution I discovered few months ago. So happy that I checked different forums to spread the good news to get rid of embarrassing smelly scalp.
I used Australian Tea Tree Oil shampoo, Lemon Clarifying Shampoo and Moringa-O Therapy Oil after taking a bath. If you are interested on the exact name of the products that I use, feel free to send me a message.