So while vegetating in front of the TV I see the new commercial for the Buick Lucerne, a truly ugly car in every possible way. However, it does have one redeeming feature; heated washer fluid. Now this is different from the heated washer nozzles on my Jetta that only work to keep the nozzle unfrozen, this actually heats the fluid to a steamy level so it doesn't freeze on the windshield I assume. So this is where I get a brainstorm. On my Mercedes I take thin copper tubing and splice it into the ww line and wrap it around the upper radiator hose several times and then wrap the coils with exhaust wrap(fiberglass) to keep the heat in. after the fluid leaves the homemade heat exchanger it should be close to 180 deg. F. I don't see a downside yet. Unlike the Buick's electric heater this will be from engine heat which is at a minimum before you warm the engine but other than that, what do you think?

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83 M-B 300D- daily driver
83 240D gray market
2002 VW Jetta TDI- beater