Have you ever tried Revolution? It's labeled for puppies and kittens, but is safe to use on ferrets and other small animals. You will need to get this at your vet as it is a prescription product. Revolution's main ingredient in Selamectin. It treats and prevents fleas, heartworm, ear mites, hookworm /(Anycylostoma tubaeforme)/ and roundworm /(Toxocara cati )/. Off label it's also used to treat mites and lice. Revolution is a topical product applied between the shoulder blades. This will take the hassle of all the ear cleaning, although you will have to clean the debris out a few times. I would do two doses 3-4 weeks apart. I used it to treat ear mites in my ferrets and it worked GREAT!! Good Luck and here's Revolution web-site http://www.revolutionpet.com/default.html . Nichole Grant [Posted in FML issue 4830]