For some reason I can't see the pictures above. But I agree with others that you may just need to do some tweaking and try lighter conditioners or do an occasion low-poo to keep his hair from getting too weighed down or even greasy looking.

You know, it's so silly - it's not like you're not washing his hair, you're just not shampooing it. And, after all, it's only been for the past 100 years or so that anyone's shampooed.
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!