When I was at my worst I didn't shower often because I just didn't care, was so spun out all the time I didn't even think about it. It got so bad lol I'd come down off the mountain from a week or two long cooking run and go take a shower, I'd have so much residual lye on and in me I swear my skin would damn near lather itself.
Also, no idea if there's any scientific basis for this, but during hardcore opioid addiction, especially heroin, I always felt like showering while dopesick made my withdrawal worse?
I'm a very clean person now lol, if messy. Shower at least once a day.