Glass imperfection - what should I do?

All, I have a 2007 CRV that is now >1 year old. When I first got the car I noticed and neglected to follow up on an issue with my windshield. It is about 2 inches wide just to the right of the steering wheel. It is a perfect rectangle that runs up the entire height of the windshield. I think it is only evident when the interior is a different temperature to the exterior and there is a little moisture. Depending on the situation it can appear to be a brown or blue stripe. Of course it only appears when visibility is an issue - i.e. never on a clear day. I have no idea what it is but the edge is just too perfect to be anything I've done. As my windshield has got more imperfections and dirtier the band has become more noticeable. What should I do? Thanks in advance.

Have you ever tried looking at it with polarized sunglasses? Not a solution by any means, but the defect may become more visible with a polarized lens and would help in a warranty claim with Honda.

If there is something wrong with the windshield and it resists normal cleaning on your part, take it back to the dealer and complain like hell. Visibility issues are safety related and if the dealer doesn't do something, call Honda Corporate and open a case. If they don't take care of the problem, I would contact your local consumer affairs...but that is down the road. Take it to the dealer first. The polarized sunglasses may help you in that pursuit.

By the way when looking with the sunglasses, try it with the glasses in the normal orientation. Then take the glasses off and slowly rotate the glasses 90 degrees while observing the windshield through the rotating lens. You may find that the area changes in intensity or color. A polarized lens blocks light components from one plane only, something on the order slats of a partially open venetian blind--but sized small enough to effect light rays. Rotating the glasses rotates the blocked plane and may show the defect in various intensities. Try rotating the lenses with a digital watch or some cell phones...the screen will go black. Two pairs of polarized sunglasses held perpendicular to each other will be very dark, because you block the light components in perpendicular planes--two sets of venetian blinds creating a grid rather than slats.

One caution with polarized sunglasses, you will see all sorts of odd pokadots or banding in automotive glass. They usually appear somewhat like dim prismatic areas with rainbow colors--much like oil stains in water. These are normal internal stress patterns in the glass.