Reddit reviews Dr. Scholls Odor Destroyers, Shoe Spheres 2 ea

Grab some sneaker balls / shoe spheres. Since your shoes are already stinky, they probably won't do too much but hopefully it won't get any worse. Next pair always store your shoes with the deodorizer in them.

sneaker balls and shoe spheres

To get rid of the current smell I've heard of leaving a sock full of expensive kitty litter for a while, or baking soda/vinegar treatments.