How do you get the smell out of leather tennis shoes?

Pro30144367
by Pro30144367
My elderly mother refuses to wear socks since she has a hard time pulling them up with her limited arm mobility. She ends up with smelly tennis. I've tried baking soda, "No More Stinky Feet" spray, putting them in the freezer and they still stink. I'd like to just toss them in the washing machine, but since they are leather on the outside, that isn't an option. Any other suggestions?

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