If you have a Cocker Spaniel or Poodle like I do, or any of the other flappy-eared dogs, you've probably run into ear problems. If your dogs' ears are smelly and gunky, you might try Four Topical Canine Ear Powder.
I use this product on my dogs and it works great. The ingredients are Zinc Oxide, Boric Acid, Idoform, and Alum Powders. It works to alleviate yeast, fungus, odor and bacterial-type problems, according to the packaging.
In addition to the fact that it really works when other products haven't, I like that it isn't an oil or liquid product. Other products make the ears wet and greasy. And iwith Four, the ears smell clean and not perfumy.
It's expensive ($17.50 per 1 oz. and $30 per 2 oz. bottle) but it lasts forever.
Make sure to check with your vet before trying new products like this.