well i dont have a remedy per se, bc i dont have bad foot odor myself, but if its based on bacteria, buy a huge refill of hand sanitizer and put it on your feet. (its guaranteed to kill 99.9% of germs/bacteria, no?) fuck it, soak your feet in it completely for a few minutes up to ankles, because that stuff doesn't work unless your hands are covered for 20 seconds or more, then dont wear the same shoes that have the funk in them because im sure there is bacteria living in there off of the dead skin from your feet, and they will just re infect your feet again, what have you go to lose, if youre desperate and hit rock bottom already. ive done some weird shit when im at the end of my rope. 9 out of 10 its a total failure but the one time it hits, i use over and over for years. tldr
but i aint no doctor