Originally posted by jaywes I am not comfortable spraying the contact cleaner as others have pointed out improves functionality, temporarily.
My best advice to you is, get over it, get some clean drying contact cleaner, and give it a squirt. Then roll the wheel one way for a few minutes, then the other. Repeat if necessary, but it probably won't be. For many people this is a permanent fix. I have not seen a single post about anyone running into trouble with this method, doing damage, or any other negative effect at all.
Realistically, it's probably the same thing CRIS will do if you ship it off to them, but you'll be paying a lot more in shipping than the cleaner is worth, and you'll be without your camera for the better part of a month.