Cleaning spots on Windshield

[babybluet]

The windshield on my TBird looks like it has spots on it. I have tried to clean them without success. Anyone else have this problem and any suggestions on what to do?
Thanks

[George]

Are the spots you see on the inside or out? Can you feel any roughness where they are?

Or, If you have your sunglasses on, and they are polarized, it will appear as though there are spots on the windshield, when there are not.

Another thought; If it's in the corners of the glass, then possibly the glass is de-laminating

[babybluet]

The spots are on the outside. I can't feel any rough area.

[CBBIRD]

I work in the glass industry. Windshield delamination does not look like spots, but always starts from an edge. Often it will have an oil slick look where it is delaminating.

Glass is hard to spot or stain, but it is possible. Most likely source is out gassing from vinyl dressing used on the dash. If you could feel feel the stain a razor blade or very fine steel wool often will clean it off with no glass damage. Try a cleaner high in content of IPA alchohol, like Perfect Glass.

If you have a stain there is a product called Glass Wax available at some auto, hardware, or department stores. Glass Wax can be used to buff out the stain. Rain X used on the surface with stains also can help, but I think it just covers up the stain. Either of the above may take multiple applications. Glass shops have special compounds and buffers that could buff out the stain. Good luck.