I'd link to the earlier conversations about this if I knew how to find them. As I recall, we left it assuming that there is a discernable pattern within the glass that only shows up with sunlight coming directly in. But my issue seems to have spread such that I see specks further away from the sun than I used to. Also, I am seeing very short lines (not more than an inch long) within the glass, not just specks. This is a new artifact of attrition, or aging, or else I only noticed because I am scoping out the entire windshield to discover what's what.