How to Clean a Dog's Ears | DoItYourself.com
You want it to be moist but not soaking. Starting from the outside and working your way in, gently rub the dog's ear with the cleaner. Wipe the ear flap first and then switch to a new piece of gauze or a new cotton ball to continue into the inside. Stop going any further into the ear canal as soon as you meet any kind of resistance.