So I noticed this a few weeks ago. I've been trying to think of how this could happen as I'm the only one that has ever washed this car and I know it wasn't by my hand. This is on the top near the windshield and it also runs along the sides of the top as well as on top of the doors. It looks to me like the clearcoat is cracking. Anyone ever seen this? The windshield was replaced a few months ago and I thought maybe they did it but it seems very unlikely that they would have done it above the windshield, all the way down the tops of the doors and on the sides of the top all the way back to the back glass.
I didn't find the right solution from the Internet.