My female use to get chronic ear infections.
At least once or twice a year.
I was taking her to the vet where he treated her with an otic antibiotic drops. One vet visit he told me
that once her infection cleared up I
should use an over the counter ear cleaner
by the name of Otic-clense now sold
under the name of Pet-Otic.
Shure enough using this just a couple times a week she has not had an ear infection since.
Ask your vet and see if he recommends
cleaning your dogs ears with it, after
the infection has cleared up.