"SteveB" wrote in message
...
Hoo, boy, I'm going to acid test some of these. I have large windows that
the previous owner let hard irrigation water dry on. White streaks. I
tried TSP, Windex, 409, ammnoia, vinegar, and nothing works. I may try
just a flat razor.

But I'm going to try some of these and see. I own the windows from hell.

Steve

i wouldn't recommend the razor. the final cleanup crew on my house used
that, and left large scratches, and since they were lawsuit-proof, i am
still looking at the scratches and cursing.