Have you tried this?
PrestoneŽ Windshield De-Icer Washer Fluid
Specially formulated for even the coldest winters, PrestoneŽ Windshield De-Icer Washer Fluid quickly removes light ice and frost. Unlike many "blue" washer fluids that aren't as effective in extreme cold, this yellow powerhouse will not freeze up in the washer reservoir even at temperatures as low as -34°F. Also guarding against re-freeze on windshields, Prestone Windshield De-Icer Washer Fluid provides outstanding windshield cleaning performance in the messiest of winter weather conditions.
http://www.prestone.com/framer.cgi?p...om/news/76.htm
Klaus
Skull & Bones Member since 2003