To very severe people: Do you ever wash/ shower and if so, how?

TLDR: Looking for a mostly safe way to shower, wash as very severe to get rid of dead skin and grimey hair. Beyond wet wipes.

I've become very severe through a crash bc didn't know I had either me or long Covid, 4 months ago. I'm bedbound 24/7, 99% of the time. Can sit up to scoot onto the commode, that's my mobility level.

The buildup of dead skin and the grime in my hair are driving me nuts.

I really want to stop being able to scrape dead skin off my body every time I scratch. I really want to stop itching.

Being washed isn't really working bc humidity will make the dead skin flake and it takes ages to brush that off, and then it ends partly in the bed. Ugh.

I've read a lot of posts on hygiene but only one from so "severe/v. severe".

So, if there are any very severe people on here, do you shower, wash, even partly, and if so, how do you avoid PEM hell and further baseline deterioration?

Thank you.

Edit: I'm in PEM and writing is hard cause I can only lie on my side so I won't be able to thank everyone individually sorry but I do so appreciate your comments. Thanks!