Remove the insoles and let them air out separately
Wash the shoes if the material allows it
Sprinkle baking soda inside the shoes overnight
Use activated charcoal inserts or bags
Place dryer sheets inside the shoes
Put the shoes in direct sunlight for a few hours
Freeze the shoes in a sealed bag overnight
Spray the inside with a shoe deodorizer or disinfectant spray
Clean the inside with rubbing alcohol on a cloth
Wear moisture-wicking socks
Rotate shoes and avoid wearing the same pair daily
Keep feet clean and dry before wearing shoes
Use foot powder or antiperspirant on feet
Replace old insoles with new ones
Store shoes in a dry, well-ventilated area