Lab with ear infection

[Redbeard]

Hey all I'm looking for a little help. I have a four year old lab that gets pretty bad ear infections. The vet told me they are a yeast infection. I have in the past used a perscription cleaner with a cottonball to keep the ears clean, but it is rather expensive. My vet did tell me to try mixing equal parts vinegar and water as a cleaner. It does work, but not as well as the perscription.

Does anyone have something else that they use, either a home remedy or even an over the counter product?

Any help would be greatly appreciated.