Lennie, I would see a vet before putting anything in your dog's ears. If the problem is ear mites, you would need a specific ear drop to kill them. Mites can't be seen by the naked eye, so a vet needs to look. A good indication that the dog has mites would be a dark brown goo deep inside the ear.

If your dog has floppy ears, shaking hard can create what is called hemotomas. Basically it means big blood blisters on the flaps. Watch for big, soft bumps. The vet may need to drain them.

Mary