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Clean your piercing regularly for the first few weeks. Cleaning your piercing on a regular basis will help stimulate healing and prevent an infection. As a result, you should use a saline solution on your ears every day, and clean your piercing with soap as needed (once a day at most) for the 4-6 week healing period.
I spray a little Bactine on a Q-tip and go inside my nose and around the piercing to keep it clean about two to three times a day for the first two weeks, and then switch to once a day. As Matt points out, It's easy to take care of because it's on the center of your face and you're not going to let it fail..