@pixiestyk ,Joy, Open truck lid and recheck all fasteners for tightness and not missing. There may have been a gasket on the spoiler that has deteriorated(foam tape) allowing spoiler to be a little loose. In this case, it would require the removal of the spoiler and reapplication of foam. Links below may help you see where the screw/fasteners, foam gasket,etc are and also shows removal and installation of spoiler. Good luck.
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