One of my old doctor was in nam ,before me '69. He advised me too ,to start with white cotton socks as the dye in the green wool is what first started the break down of the skin for the infection to start (right at 50-yrs. ago) he also had me use regular PINE-SOL soap on my clothes , airing my feet at night,out side the sheets. ,,,,,worked for me , in the last 50-yres only had one flare up .
Cotton socks retain moisture. Polyester Spandex socks do not. Believe it or not but cotton socks are terrible. I was under the misconception that cotton good polly bad for most of my life. Then I went into a long distance runners shoe store and boy did I learn a lot. Good mesh running shoes with polly socks is about all I wear and my feet are never sweaty or stinky anymore even after mowing.