A few people have mentioned the Cobra MFs for glass. Their *WW* MFs for glass really do work incredibly well, I was astounded. Their orange/yellow plush MFs for glass have been a mixed bag for me, some linted quite badly but one works so well that I reserve it for fine optics.
"I must be the only person for whom the Autoglym and 1z glass polishes did *not* work well :nixweiss Just can't get 'em to leave things perfectly smear-free. Note that I'm generally a big fan of both those product lines. "
I can scratch that one off my list!:clap:
"For household windows, especially when using concentrate mixes, I sure do like professional glass-cleaning tools- scrubber/squeegee combos used in conjunction with razor blades (in ergonomic holders). I do 95% of the work with those and then give it a final touch-up with a glass towel. Sorta surprising how often the razor blades come in handy (for shearing off stuff that's really stuck to the glass)."
I bought 4 gross of single edge razor blades at a flea market about 3 or so years ago for $5.00 I think, that's a hell of a lot of razor blades! I agree, I have used them on windows, for bug snot, which is actually (varnish) if you include the whole bug, and a lot of other uses. Haven't put a dent in that purchase and probably never will.
Oh, on the topic of Windex- a while back they made a "Windex with Vinegar" version that actually worked quite well IIRC, at least for household stuff (never tried it on the vehicles). Dunno if they still make it though..