9. Polish Your Valuables
And finally, here is a use for banana peels that is not about eating them or applying them to your body. You can actually rub a banana peel over shoes, leather, and silver items to clean them and make them glow.
It is the potassium content that makes the bowls good for it. Simply wipe the inside of the bowl over the entire surface that you want to later polish and polish for a brilliant shine.