Couple of things on this subject...
First, I think the product you use is important. I recently bought Simply Green`s automotive window cleaner and I found there is NO way to clean windows without streaks.
OTOH, when I use Stoner`s I have much less problems.
I also DO NOT use MF towels for my window cleaning. I`ve used at least 10 different types and they`ve always left something behind. Usually I`ll use an old cotton t-shirt (rag) for my windows. Best results for me.
The last thing I do with windows is that I do the outside windows with horizontal cleaning strokes and the inside windows with vertical ones. This way, if I get streaking or some other imperfection, I can figure out where the problem lies right away.
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