Horrible dry scalp. Any advice??

Ho

I have been having a horrible dry flaky scalp for awhile now. I have tried dandruff shampoos and conditioners. Tried moisturizer shampoos and conditioners. Even tried this Milkshake conditioner spray in that salons use. I wash my hair like every 3-4 days so I’m not over washing it.

Idk how to make it stop and go away. It’s mainly in the front above my forehead.

Anyone have similar problem with solutions?