Quote:
Originally Posted by Chas H
Regular old blue washer fluid is flammable because of the alcohol anti-freeze. If it boils off because the washer tank is heated the fluid could freeze. I haven't seen Benz make an issue of it, so I think you've something else going on. Certainly the blue stuff in my washer bottle hasn't boiled off.
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Regular old blue stuff contains Isopropyl alcohol. The cheaper washer fluids contain less of it, the better stuff more. Since the alcohol has a lower boiling point than water, I can see where heating the fluid would cause it to evaporate, leaving water, soap and blue dye behind.