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You may be more familiar with softener sheets by the name of dryer sheets, but in either case, the odor fighting properties of this product are perfect for de-stinking shoes. You can simply push a sheet into each shoe, or you can slip one underneath each insole. Used dryer sheets can also be used to combat shoe odor. This is a great way to recycle, and will leave your shoes smelling laundry-fresh. Dryer sheets are relatively thin and light, and the heat of your foot will help release its odor fighting ingredients. However, sometimes dryer sheets can bunch up in the toes of your shoe and become uncomfortable. If you find this happens to you, leaving dryer sheets in your shoes while you're out and about might not be the best option.  Most sheets will last about a week before the odor fighting potential is lost. Once your dryer sheets stop smelling fresh, you can throw it out and replace it with a fresh one. If your shoes have thin insoles or you have sensitive feet, or if you find that dryer sheets uncomfortably wad up in your shoes, you may only want to use dryer sheets when your shoes are off.  A few hours with dryer sheets inserted will usually be enough to chase away the stink. Severe cases might benefit from a night spent with dryer sheets inserted in each shoe.
Tuck fabric softener sheets into your shoes. Wear your shoes with dryer sheets. Remove the dryer sheets when the odor is gone.