Self-experimenter Seth Roberts cured his foot fungus when he bought more socks. Anti-fungal medication didn't work. He wrote about this on his blog, and other people are reporting success with his more-socks cure.
I remember reading on your blog about more socks as a cure for Athlete’s Foot and I had a fungal infection on my foot from climbing around barefoot outside, I think. I tried using two different antifungal creams. They didn’t work. To be honest I didn’t use them for the recommended time cuz it’s a huge fucking hassle. You have to put it on your feet, let it dry, rub it in blah blah blah. And it’s kinda gross to use. So I went to Uniqlo [a Japanese clothing store] and bought like 20 pairs of extra socks and forgot about it. But when I wash socks the washed ones get put in the back of the drawer so the effect is the socks I wear spend like 3-4 days away from my feet every time. Anyway, the infection COMPLETELY disappeared. There is a weird sense of satisfaction from this kind of cure. It feels like just by doing some small things ‘right’ all these health issues can be fixed.