This is kind of gross and I don't know where to post it, but here goes..
I have rather large boobs and in the last year or so they have started sweating more and more underneath, not just during exercise but during a regular day. I put deoderant there sometimes and it doesn't help, the odor is disgusting too - very sour. My bras start to get stinky and stuff with little to no physical exertion. I dont have a problem with sweat anywhere else on my body- my armpits rarely sweat! I wash there everyday and I still stink

Especially when I wear perfume and it mixes with my sweat smell (NASTY!) What can I do besides buying one of those "dry" bras??