I have recently noticed my rear window defroster does not work on the top 2 or 3 lines of the rear window. Upon inspection i noticed it is not even made semetrical. I mean the wire lines are not the same on both sides at the top. One side doesnt even have lines at the top. has any one ever noticed this , im wondering if its broke or or defective or just designed this way for some stupid reason. Any thoughts on it? should i take it in to the dealership and complain?