Banana peels contain salicylic acid, a common ingredient in over-the-counter wart removers which dry out warts. Make a homemade banana peel patch to treat warts naturally. Cut a small piece of banana peel and lay the inner surface against the wart before going to bed. Secure in place with adhesive tape, and change the dressing once or twice per day as needed. Repeat the treatment for about two weeks or until the wart disappears.