This happened to me in the car when adding a new kind of windshield wiper fluid over the old one. It did not clog the pipes, but made the resulting fluid very slimy, and it could not be wiped out by the wiper blades. The result was that the windshield became translucent and very hard to see through. When it stayed longer on the windshield, it frosted like ice, making it even harder to see through. I had to stop at a service station and drain all that fluid out, then fill the washer fluid tank with water to clean everything.

The new fluid by itself was fine, it was just the combination of the two that created a reaction.