Cleaning your dog's ears on a regular basis can help prevent infections and allow you to recognize problems quickly if they arise. Check your dog's ears at least once a week for dirt, wax, and debris. If they look fine, then simply leave them alone. If they need cleaning, remove dirt and wax with either a cotton ball with hydrogen peroxide or a commercial ear cleaner for dogs. Thoroughly wipe all visible parts of the outer ear. Avoid using cotton swabs (q-tips) or going into the ear canal, to prevent accidental damage to the eardrum