My windscreen is badly gritted from road dust. on 2004 Toyota Corolla

Is there any polishing agent I can get to clean it up. The screen is very dangerous in the night when raining.

3 answers
The only way to really fix it is to replace it. I've seen polished windshields and it makes for wavy sceneary because there is no way to keep from polishing multiple lenses into the glass.
repl for approx 165.00 then only answer
Do you have comp. insurance? If so glass should be covered!