Inspect Your Dog’s Ears Regularly. Use a petscope to check for redness, excessive wax build up or any other foreign matter. Sniffing your dog’s ears is another way to detect problems early. If

Dogs with floppy ears, like spaniels and bloodhounds, are very prone to ear infections because very little air flows into their ear canals. There are also breeds, like the Lhasa, that have a heavy growth of hair inside their ears. Excess ear hair is a problem, try plucking just a few hairs at a time will be less irritating for the dog.
Some vets recommend that owners routinely flush their dog’s ears with warm water at the slightest hint of odor. Other home dog ear care cleaning remedies include mineral oil, hydrogen peroxide, or a combination of equal parts of vinegar and rubbing alcohol. If your dog has open sores it's best not to use the vinegar and alcohol because it will cause a burning sensation. A dog ear wash containing Tea Tree Oil, which is also formulated to dry the ear canal is an excellent choice. Try using a pet ear-drying agent after bathing or swimming especially if your dog's ears retain moisture and don't dry promptly.
A dog’s ear canal is L-shaped. It descends vertically and it makes a 90-degree horizontal turn before it reaches the eardrum. Many vets urge caution when inserting anything into the ear canal, especially cotton-tipped swabs. They can actually push dirt and foreign matter deeper into the ear if not handled properly. You can even lose the cotton tip in the ear canal.
Dont put off your dog’s ears cleaning job. Remember regular cleanings can prevent many common ear problems. If you think a problem may be developing that is beyond the scope of your home dog ear care routine, take your dog to the vet for a check up immediately.