Dissinfecting. Bathing is best, daily or weekly. Some people believe that they need to dry out the skin, and hair. The problem with drying out the skin, is then the body is then trying to produce more oils to replace what has been stripped off. Most people think that bathing with an Oatmeal base shampoo is best, since it is not a harsh shampoo. Actually it is the opposite. Oatmeal is a grain base, so you are actually feeding the problem. Doing a good soak on the feet, etc. with a home brew of an anti-fungal mixture of 1 gallon of water, 1 cup of hydrogen peroxide, and 1 cup of vinegar is the key. Vinegar is a great, safe way to break up yeast. Keep in mind on a dark dog, the hydrogen peroxide can change the coat color, so on a black or dark dog, just mix the water and vinegar. You can either fill up the tub, or sink (in cases of a smaller breed) or even use a coffee can to dunk the feet in to soak. Be sure not to get the mixture in your dogs eyes, it is best to pour from the collar back. As the yeast dies, it becomes layer above layer of dead yeast, so scrubbing the old dead yeast off is important. This can-and should be done on a DAILY basis until the worst of the yeast is gone, then you can move to weekly, then monthly if needed. Keep in mind, if you do not change the food to one without wheat, corn, etc, your problems are not going to go away. Do not rinse the areas where you have put the mixture. Towel dry.
In the case of ears, a good ear cleaner is a necessity at home. Knowing how to properly clean the ears is also important, and the anatomy of the ear canal. Cleaning once a month or every other month may work for some when they are groomed, but for others, daily or weekly cleaning is needed. Any breed with larger, heavy, drop ears, have a hard time with the ears being able to breathe. The more hair that is on the ears, means even more weight on the ear. Daily cleaning may be necessary to keep yeast at bay. For breeds that grow hair in the ear canal, this does need to be plucked, as over time it forms a "plug", and completely shuts off the canal. Wetness becomes wax, wax becomes yeast, yest becomes infection.
For any other questions, please feel free to call your Veterinarian, or Groomer.
I hope you enjoyed reading.