My mother is 92 and smells just fine. Of course, she has all her marbles, showers, shampoos, uses lubricating cream, does her laundry and changes her clothes on schedule. Her male friends in her residential community have aged skin and sun damage, but they smell just fine also They are lucky, of course, to have the resources to live in a managed community w. housekeeping, communal dining and socializing and ancillary medical services.
And I think that the elderly who get sloppy are not lazy but depleted and exhausted.
My grandpa, an immigrant from Lithuania who lived into his nineties, always smelled like salami, pickles, cigars and schnaaps. I loved that smell.