I noticed this same thing when I first started bitters and jiaogulan, it only lasted a couple of weeks, but it was pretty bad. I put it down to my liver getting rid of junk. I noticed that when I drank some DE mixed into my water, 1teaspoon DE in water per night for a week, the stinky smell left quick smart. I think I just needed a good clear out :)
I like to use essential oils (usually lemon or orange) mixed in with water, and put in a spray bottle, for air freshener.
I use mag oil as an underarm deoderant, this works really well, even in our hot summers.