Fergie needs her ears cleaned, which I've never done. Is this easy to do, or should I have the vet do it when she goes for her checkup/shots next month? She doesn't have a huge wax buildup, but a couple of times I've seen her stick her back foot in an ear and pull out wax, which grosses me out. It would be nice if her sister would clean her ears, but Fern is content to have her ears cleaned 'til they drip and never return the favor.