My dog (cocker) mix, has had black inner ears which I've attempted to clean with a dry kleenex. I take him to the groomer regularly when his hair starts to get too long and only once did I ask her to "clean his ears". OMG, I felt so bad for him. Sure, the ears were clean but they were red as a tomato and sore. He kept trying to touch them and shake his head constantly for about two days. Within a week his ears were black again. I called the groomer and asked her why they get so dirty since my dog doesn't interact with any other dogs and he's always on a leash when we walk. So why are they dirty. She explained it was probably a yeast infection brought on by too much "wheat" in his dog food and to try just giving him "raw" red meat for a couple of weeks. Well he wouldn't eat it. So I reverted back to his regular food. Also, I asked her what she did to clean his ears because although they were very clean, they really bothered him for a few days afterwards and she indicated she "poured" straight alcohol into his ears and flushed them out until the cotton was clear. I was appalled... straight alcohol? Are you kidding me? So after searching the web I found a recipe of 1/3 c of water, 2 tbls. baking soda and 1 tbls vinegar. Seems harmless, but I thought I'd get your opinion before I used it. What do you think? Thank you in advance.