I don't do windows, but have been having to do outer doors of a few businesses that I clean. I've currently just been using glass cleaner and paper towel, but the outer doors get bad and it takes me a long time before they don't look streaky. I'm wondering if there is a better solution. I don't know if it's worth getting out a squeegee and bucket each day for two doors. Could your cleaner be used in a spray bottle with paper towel? Also, do you switch cleaner in the winter? I've noticed some windshield washer fluid in the janitor's closet and wondering if that was used in the winter so they could clean without the cleaner freezing. It sounded like a good idea to me, but like I said, I haven't really done windows/glass before. (I know it's a way off, just want to be prepared when the freeze comes!