Onion-y Pits

I stopped using deodorant at night cause I sleep alone and I mean, I shower in the morning so it seems like a waste.

HOWEVER

When I wake up, if I’d sweat throughout the night—even a little bit—my armpits smell like ONIONS.

I’m not shocked or surprised by this—if I ever use and sweat I smell a bit; it’s fine. My question is for people that don’t use deodorant often or use alternatives: how do you prevent yourself from smelling funky after twelve hours?