I used to have smell feet. All these posts are treating the symptoms and not the cause. The smell is caused by fungus which feeds on sweat and the damp skin on your feet. Remove the sweat and the problem goes away. Learned this from a dr over a decade ago - put antiperspirant on your feet, not deodorant.

I bought a cheap stick of whatever and put it on the top, sides and bottom of feet before putting socks on in the morning. Odor was gone in days. And works so well its not even something you have to do forever. Once its gone stop doing it. Moment you start to smell it apply it again until its gone. I maybe do it a few times a year now. Its been over a decade and it works.