There is no "should" here.
Welcome to the board, Iseeall ~
This type of issue has been posted on this board several times in the past, a guy who used to do the right things that becomes someone who is a slovenly and filthy.
So while dating, there was good sex, regular/normal hygiene, normal eating habits?
Then after marriage
Thank you so much everyone for your thoughts and comments.
It sounds like there were some clues, you just weren't aware how serious the problem is.
My ex has bipolar disorder.
What kind of motherly things do you do for him?
I agree 100% with Musiclover.