a friend was having problems with her dog's ear all the time, infections, very dirty ears even though she was cleaning them. she was at the vets almost every week. she put her dog on "solid Gold" Seameal powder,
twice a day, and she found a big improvement. after about 4 days she saw that her dog was not shaking his head as often and not scratching as often on his ears. she still put drops in them twice a day and cleaned his ears every day but the stuff inside was reduced alot.
I'm not saying that it will cure the problem, but it might help.
Arch was having very dirty ears even though I was cleaning them also so I tried it .( I know in my case it's not the same as an infection)
Arch and Bree has been on this ever since.