As I was reminded in the comment on the last post olive oil is good to put on the cotton ball to help clean pet ears with when your pet has ear mites. Baby oil is also good. The medicine I got is an oil base and says it has allo vera in it to help sooth the raw ear.
And you need to remember to wrap your cat in a large towel or a blanket if they don't want you to clean their ears. My gray kitten is real good about it but the black on scratched like heck when I did her ears and scratched my hand. Don't take chances on getting scratched if you don't have to.