Once a week when he gets his bath. He had an ear infection when he was about 10 weeks old so we're very pro-active with keeping them clean. He actually enjoys it..lol..
I do Dudley's about 2 or 3 times a week...he LOVES to have his ears cleaned. He hates wrinkle-cleaning, but loves having his ears done! Weird little guy!
I picked "other" because some our ours we hardly ever clean because they don't get dirty, and a couple like Jewel we have to clean at least once a week and some times more if her seasonal allergies kick in.
Once a week usually. Brie runs if she even thinks I'm going to get the ear wash bottle. Then comes the smack down n the ear wash spray everywhere but in her ears! Lol
I clean the inside part of their ears with a baby wipe to clean the inner surfaces of the ear, and to remove any dirt and wax. I don't go I to the ear canal. I have a ear cleaner from the vet, that I use when needed.