Put them in the freezer or outside: While this sounds like an unusual method, putting your shoes in the freezer is a highly effective way to kill the bacteria that cause shoe odors (the bacteria is no match for the extreme cold). However, before you just toss your shoes into the freezer, it’s best to put them in a plastic bag first so you don’t contaminate your freezer and its contents. Leave the shoes inside overnight, then and take them out and let them thaw a bit before wearing. And if you happen to live in a climate where the temperature regularly drops below freezing at night, putting the shoes in a paper bag and leaving them out for the night isn’t a bad idea either!
