The problem is not that the more expensive WW fluid dries up too often, the problem is that it is expensive.

The fact is the weak detergent solution is virtually free and not time-consuming to make.

I might actually NEED a heater in the W washer should I make a trip north (I have driven it to a potentially freezing climate once before), and then I would forget to reconnect the heater.

It is just annoying when the dash light comes on, telling me I am about to run out of WW fluid.

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Semibodacious Transmogrifications a Specialty

1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)

"Time flies like and arrow, yet fruit flies like a banana"
---Marx (Groucho)