Add a few drops of essential oils onto the cotton ball and place each one into the shoes.
Put the essentials onto the cotton balls and microwave them for 30 seconds.
Light switches
Take a cotton ball, spray rubbing alcohol onto it and essential oils.

Image by Andrea Jean Cleaning via YouTube
This would freshen the space and remove any build bacteria that may be housed on the surface.
So, every time you may open them, they will smell fresh.
The pure vanilla extract contains alcohol so it kills the bacteria and removes the odor.

