New to the forums so hope this is the correct place for this thread. This past weekend I gave my 2013 tahoe a very good wash and detail and noticed some sort of a liquid stain around the sunroof and it runs down into door molding area. Almost looks like a chemical stain. Hard to see unless it's under a LED light then its obvious. Bought this car used in june so unfortunately I have no clue what the previous owners did. Any idea on what would fix this? Any advice/opinions on this would be appreciated. Thank you!