I think it's already been mentioned above, but if not, you might add an apple cider vinegar rinse once a week. More often can make it worse, but I find an occasional one helps - I usually don't remember to do one every week though.

Just massaging to stimulate the scalp, even without oil or anything, seems to help mine. My scalp and I've also been enjoying using a little flat shampoo brush to massage scalp and loosen debris (sorry if I'm repeating myself).
2C/3A/3B - modified CG - fairly fine now, normal/low porosity/normal elasticity

Current Main Rotation: MG217 medicated or Aim2Health 'poos for scalp, Elucence cond., Spiral Solutions Protein & Deeply Decadent Cond., CJCCCC reg or lite,CJ Pattern Pusha,, Giovanni LA Hold Hair Spritz + lots more, sporadically

HG Method: Super Soaker + Smasters-ing, brief upside down diffusing w/360o diffuser then clips/clamps & air dry. Newly gray - stopped my henna glosses!