@Delphik I've been experimenting with baking soda to wash hands, body, and hair, occasionally and it seems very effective. Usually I use shea butter. My friend Peatler on Twitter/X suggested baking soda as a milder "soap" to saponify the oil on your skin. I imagine you might know that saponified soaps can disrupt the endocrine system.
Ray Peat:
"I don't think it's a problem. The soaps and shampoos people use are worse problems. Just washing the skin with pure soap alters the skin's endocrine function for days. and doing it every day is an "endocrine disrupter," even if there are no toxic additives in the soap."