Noticed this today — parallel hairline cracks on the inside panel of the door. I though they were just different sections until I noticed the one at the bottom left was not parallel and clearly a crack. DW says she noticed it back in June, so it wasn’t caused by our interminable summer heat. And it never got below 30 degrees this past winter. There have been no moisture leaks as I’m anal about caulking things outside. Just old age? Defective product?
Has anyone experienced this? If so, did you replace it? It looks like I can pull the bottom lip off and the window out and slide a new one in. Or caulk them with clear and call it good?