Driving early this morning while the sun was still low in the horizon, I noticed what I would describe as a watermark in the windshield (or windscreen). It is a Japanese language character about 2 inches square just above the rear view mirror attachment and inside the sun block area. The only way to see it is under unusual lighting like I encountered today that early in the morning. I tried to look for it later but it is not visible under normal daylight.
Has anyone seen this?