Hello All- We just purchased a 2011 Edge M21...but still haven't had a chance to actually use it yet, but looking foreward to the experience. One question we never had properly answered, (and can't seem to find in the owner's manual), was- How does a person go about "properly" cleaning the windows. As they are plastic, we are very concerned about scatching them up. Thank you for your answers...great to be here.