IF your camera is under a year old, it is still covered under Canon's one-year warranty, therefore, the only safe thing to try before sending the camera for service is to use canned compressed air to blow out the area between the lens barrel and camera body since even a small amount of sand or grit can cause this problem but a camera this new should not experience this problem. Next, I would contact Canon support directly by phone, (If it is still covered under the one year warranty)
Please keep in mind that my diagnosis & solutions provided are directly dependent on the accuracy of your description of the problem. As with any "do it yourself" fixes, success is a "team effort", since I can't see or touch the camera, and relies on the customer's manual dexterity and ability to follow the instructions well.
If you are unable to us the warranty approach and you need "do it yourself" repair procedures, please let me know.
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