I would first get her used to having you handle her ears, if that is an issue. Play with her ears, rub your fingers along the inside of it, and give her small
tasty treats while you are doing it. Once she doesn't mind you doing that, just wet a cotton swab with the ear cleaner, leash her up to something so she can't dart off, smear some tasty peanut butter on something to let her lick ...