When raising and lowering the top on my C6 convertible, the waterfall strikes the lower edge of the rear window, It is just a click with little interference but I am concerned it will mark the paint on the leading edge of the waterfall or scuff the bottom of the rear window frame. There is some slack in the window which allows it to contact the front face of the waterfall. My arms are not long enough to press the control button and hold the window forward at the same time. Does anyone have a fix to hold the lower edge of the rear window forward about 1 centimetre so it clears the waterfall when raising or lowering the top?