Ear Issues

Just wondering what others might have used for their dogs problem issues with their ears/ ear infections etc.
Are there any natural methods out there people have used with success??

I have heard people say to use Tea Tree Oil diluted with a wet cotton ball.Also using vinegar with water & rubbing alcohol - all 50 /50 .
Also giving Yogurt.
I've been searching the web.. and some also refer to something called Zymox..

Thinking my girl might have an bit of an ear infection again- some redness & warmth.. but also a fair bit of black pastey flakes.

Just wondering what natural ways others have used before with success before taking on another vet bill.

Thanks