A 10:1 mix of distilled water and distilled vinegar wiped down with newspaper also works great.

I keep a can of Stoner Invisible Glass in my car, I think that stuff works great too.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record