That's prison! Jails are quite different. She's a brand spanking new inmate (I work in jails, and the intake jail in our county does NOT permit or require showers until the inmate is out of restraints/cuffs/suicide watch/danger to others status).
By the time TS gets to prison (about a year from now, maybe less), she'll have been re-shaped by jail (which is the whole point of how jail works). But new prisoners at the jails where I've worked do not just get to take showers, they try too many shenanigans for that to work. Perhaps had TS not attacked an officer, she might have had a bit more freedom, but looks to me that her hair has not been washed since SC.