Hi all, I need help with a crack I noticed on my front glass roof. I do not recall anything ever hitting it, and the crack starts at the edge of the roof. The top of the windshield that is right next to the edge of the roof (where the crack starts) is perfectly fine, it has no cracks or impacts. Please advise if this is a stress crack or an impact crack. There is just a single crack, not multiple crack lines in different directions that I would expect to see due to an impact. Thank you!