Baking soda will defunkify almost anything (given enough time and exposure, which is why I suggested repeated applications), and both that and the Epsom salts are about as harmless as it could get; they're ever so mildly antiseptic, too.
I am also a big fan of "sensitive skin" unscented baby wipes.
we have a water softener so I think there is probably enought salt in the water already.. not the same as epsom I know..but close. I hope they quit stinking...peeeewwww