Our Toto had an infection in one of her ears and when we got to the bottom of the cause .... the groomer was snipping the hair down inside rather than plucking it! Our vet was furious. No doubt, no more groomer!

I now take her to our vet for ear plucking, nail trimming [I'm learning but don't feel confident that they are short enough!

] and gland expression when needed. I bought clippers, etc. and groom her myself. When I bathe her, I put those little soft foam earplugs in her ears and it works perfectly. I used cotton at first but found that it absorbed some water, the earplugs don't.