Do you think it could be a porosity issue? I agree with the poster above, but I also think you may need to determine your porosity. Low porous hair needs different care that high porous.
I personally try to make sure that I'm properly moisturize in wash day because that will determine my moisture levels throughout the week.
I DC, cowash, use a reg conditioner to detangle (rinse a little more than half of that out and then seal that conditioner in with a conditioner rinse -- an ounce of conditioner and 6 ounces of water) and then use a leave in and seal that in with and oil. I know it sounds like a lot, but my hair is low porous and it's hard to penetrate the hair shaft.
Cowash: DevaCurl No Poo or As I Am Coconut Wash
Conditioner: Giovanni Tea Tree Tingle
Leave-in: Paul Mitchell the Conditioner
Styling Products: EcoStyler Olive Oil Gel
Oils: Coconut oil. Carol's Daughter Hair Balm.
Deep Conditioner: Shea Moisture African Black Soap Purification Masque (also a great detangler and cleanser)