My wife and I have been using vapo rub on the feet for about 10 years when we found out about it.My inherited bad vein problem, which women usually suffer from more than men, has made my legs and feet highly susceptible to Athletes Foot fungus which has resulted in multiple, sudden, serious cellulitis outbreaks over the years, requiring at least month long treatments with strong antibiotics to beat it back.
So for anyone else here with Athlete's Foot issues -- naturally, I've tried everything under the Sun for decades just to keep my Athlete's Foot in check. It's everywhere so there's no getting away from it. However, mainly from shared elder care stories and experience, I've learned that a cheap little tub of generic vapor rub works at least as well as any of that overpriced crap on the market. Plus it's relatively fast and easy to apply. Under and between the toes, under and on top of the nails. Can't get it fully under the nails of course, but it stops any existing fungus from spreading, keeps the nails from cracking as much, and seems to help the cuticles out as well.
Another little trick we learned was how to stop feet and leg cramps instantly and I mean instantly. At night when you get a cramp, have a packet of mustard in the nightstand drawer. Open the packet and squeeze out 1/4 teaspoon and swallow it. By the time you put the packet back in the drawer the cramp will be gone. Amazing.
Next time you get a burger to take out at Micky D, throw a handful of mustard packets in the bag.