I've found the clotrimazole 1% cream DOES NOT cure athlete's foot. What I found gets rid of the fungus is fluconazole (Diflucan- 1 or 2 doses). Also for Diflucan, I found taking the capsule (150mg) at a lower dose (2times a day) for 3-4 days was more effective than taking the pink tablet (300mg) once that is a higher dose.
However, fluconazole does affect the liver, so I don't think you should be taking this regularly.