How long will it take for the scabbing behind my ears to go? I'm 28 days post op lower face lift/neck lift.

28 days po lower face/neck lift healing slow lots of bruising and swelling. Seeing ps reg. Presurg, wash hair every 3rd day, do not have oily hair . Stopped using the Johnson's bs -it was irritating scalp (not incisions). Using Aveeno bs . Is it best to wash my hair every day to rid of scabs behind my ears or let them alone. Was using neospor, burned and irritated the incisions, so I stopped . Ps said ok to leave dry. Slow to heal/fall off but they do not hurt. Anything else I should be doing?