To do this method, you just have to wash and dry the shoes, then put orange peels, mandarins, … and let dry naturally.
Use white salt
When the shoes smell bad, you can take some white salt and wrap it in a small cloth bag or handkerchief and put it in the shoe for 8-10 hours. Bags of salt will be used to absorb moisture, remove odors and kill mold bacteria. For maximum effect, make sure the salt is dry. The fastest way is to add dry roasted salt to the shoes.
Tea filter bag
Tea contains tannins, a substance that kills bacteria and mold that build up in shoes and helps eliminate odors. To deodorize shoes this way, just soak 2 tea bags in boiling water to activate the tannins.