What's an easy solution to my 6 month olds craddle cap?

Patience: Use a gentle soap and don't irritate by picking at it. With time it will go away if it is just cradle cap.

Oil Daily: If you oil daily and only wash twice a week, it will go away. It may occasionally reoccur, but this therapy, in my experience, always works.

Olive oil: Agree with dr d. Easy first step: use olive oil to loosen the cradle cap flakes. If that doesn't work, then you can try Hydrocortisone 1% cream daily for a week, and anti-yeast Ketoconazole Cream or shampoo twice a week for 2 weeks. Good news: this is usually self-limiting.