Alcohol. No doubt that stench is caused by bacteria and fungal overgrowth. Alcoholic wiping pads will help a lot.
I got a fungal infection on my shin (from sitting on a court sweaty and wearing basketball shorts) and it wouldn't go away with Lotrimin cream or soap. So I tried anti-bacterial wipes (the kind you use to wipe counters) and sure enough, the itching stopped and the redness subsided after about 3 days.
Lamisil foot cream or spray, odor eaters foot powder, change socks twice a day. Spray shoes when not wearing them with lysol spray . And always wear sandals or flipflops to air out feet! I grew up with five brothers.