Your shoes get smelly because the moisture in your shoes allows odor-causing bacteria to thrive.
Pour a little cat littersilica-based if you have itinto an old stocking or sock and wrap it up.
Stuff one into each shoe and it will dry them up while adding a nice little cover scent.
Just double-check there arent any holes in the stockings or socks.
Nobody wants a bunch of tiny rocks in their shoes.
10 Ways to Stop Shoe Odor!| YouTube