Where's the neurodiversity crowd tonight? They'd normally be all over this like a layer of fluffy, fragrant soap bubbles.
Unusually for me, I'm going to hypothesise that this guy might have some sort of autism-related disorder, which prevents him being able to organise his life outside of work and involves some hyper-sensitivities making it unpleasant to shower.
If that were so, some alternative strategies might hypothetically help, such as:
• Bath instead of shower
• Anti-bacterial wipes instead of either. You can swipe yourself while in the loo, so minimum hassle
• Clean clothes every day. Most BO, believe it or not, is due to skanky clothes
• Sugar-free chewing gum. It contains xylitol, which combats mouth bacteria
• Apples! For some reason, they often get rid of bad breath
• Mouthwash. Easier than brushing, and at least he'd get some fluoride
• Finally, no-one should have to micro-manage their spouse. But if he does have a 'programming' disorder and the relationship is genuinely good, it would be worth sitting down together and going through aaaaalll the things you do to keep the family running. Divide these tasks in a way you both think fair. Then (sorry) you'll have to make a big kitchen chart with all these tasks clearly marked by day, time and person.
I kind of doubt the validity of this hypothesis. But, here you are, @gjkufbb, a potentially constructive reply!