I have crazy skin and if there is even a HINT of tinea I catch it. urgh.

If the tinactin doesn't work, try lotrimin (stronger) or lamisil (strongest). I once had to go on oral lamisil for six weeks. OMG. sorry, just here for the over sharing. :P

though, here it says tinactin is best! hm, will have to try that next time.
http://www.galttech.com/research/health/athletes-foot-cure-treatment.php

probably flipflops are better than over the foot shower shoes... whatever keeps the foot up off the floor, yet dries quickly. :)

best wishes!