if it's just a little bit and not too deep you can wipe it out with a q-tip. If there is a lot you can either buy a bottle of ear cleaner and do it yourself or have a vet do it. Your vet can also check for ear mites (just in case) while she is there. My Havoc was treated for ear mites when I first got him and his ears just seemed to stay nasty for a couple months afterward. I was cleaning them twice a week for awhile until it finally decreased in frequency.