If you have athlete's foot, gently wash the affected area. I usually got it between my toes.
Use a hair dryer on warm, to dry the foot for 60 seconds (that's a long time, seems like ! ) Use warm, not hot. We're not trying to cook the foot, but dry it thoroughly. Gently separate the toes, if necessary, to get the warm air onto the athlete's foot. Don't pry the toes apart, as that could injure skin that might be weakened by athlete's foot.
Then apply your favorite athlete's foot cream.
The athlete's foot is usually cured on one treatment. If there is a hole in the skin, it takes a while for the skin to heal.
Alternate cure:
Soak the area in vinegar (from the supermarket) for 5 minutes. You can use a paper towel wetted with vinegar and rolled up and placed between the toes. Or, just put vinegar in a bowl and soak. DO A TEST FIRST, with a small area. 5 minutes with straight vinegar was fine for me.
Then rinse and dry with the hair dryer on warm. Apply your favorite cream.
Other factors:
I could get raging athlete's foot in one night, if I folded the blankets on my bed, at the foot of the bed (in case I got cold during the night). My feet were covered more than the rest of my body, and the feet would sweat and get athlete's foot.
Ultimate cure:
I found that I was eating too much salt. My body was sweating to get rid of the excess salt. The excess salt was in sourdough bread that I would eat. When I cut out all salty foods, namely sourdough bread in my case, I would sweat less, and rarely get athlete's foot any more.
Hope this helps.
Best regards, EngineerGuy