Hi, I had athletes foot for almost 10 years that wouldn't go away and stay away, and towards the end I developed nail fungus. I killed it all off in ONE night successfully (4 years ago) and it has stayed away using urine therapy. I saved my urine for 2 days then put the urine in two bags I duct taped around my ankles and slept with my feet soaking in the urine all night. Woke up, took it off, washed my feet, and since then have not had even the first sign of a problem.
It is kinda gross but it worked.
I had NOT tried oregano oil, I would have knowing what I know now. That probably would have worked, I don't know.
Ultra violet or far infrared sounds promising, too.