If you've been in the dark and under fans while actually working his hair...some just don't grow hair.
You've got to have hair in order for it to pop.
My advice...if you have a soap foamer then mix 1:1 water and hair conditioner. Stir that up and foam it on him every other day on the wash rack. Comb it in NOT brush...the scrub brush will squeegee it all off. Let it sit for 5 mins and rinse. Now don't put anything else on that steer. No sheen. No revive. No oil. You have to soften the hair that he does have without silicone.
Plastic scrub brush with the coarse bristles. The one with fewer bristles.