Prevention is better than cure. Instead of making your dog suffer from all these problems, it is best that you do not encourage the growth of mites in their ears by taking proper care of your dog's health. This can be done by keeping their ears absolutely dry. Mites tend to flourish on moist surface. Also, let there be free flow of air in the dog's ear. Trim the hair that grows in the ear because that traps the dust particles and dirt, leading to an infection. In case of any doubts, do not hesitate to contact the veterinarian.