Baths with vinegar in them. I know some people have done bleach, but that's kind of scary to me. Let it air dry as much as much as possible. Even something topical (neosporin or something like that) would be better than a whole system antibiotic.
I use distilled water in a bottle with just a few drops of TTO. Our last allergist told us to do the bleach thing too (like 1-2 T. in a full bathtub), but I've never tried it either. But if it was infected enough, I would try it before abx. But the TTO works pretty well for us.
Can you have sodium ascorbate? SA has been shown to work well in curing staph infections. Best way is actually IV, which you probably won't want/be able to do. <a href="http://www.livonlabs.com/" target="_blank">Liposomal vitamin C</a> may be an option, but again, I don't know if this would work. Oh, you can apply SA topically in a non-allergenic medium too.