Well heres the truth about cleaning windows. I am a professional window cleaner and the newspaper and vinegar and just plain hot water are all tricks from the past.
The best way to clean windows by far is Dawn dishwash detergent liquid of course and a bucket of water. Just a squirt will do ya.
You will need a few things and they are all inexpensive and easy to find.
Get a squeegee a couple dry rags and either a sponge or use a wand as we do in the window cleaning industry. Not so easy to teach in a couple of sentences but once you have thr right supplies you can figure out the rest. If you cant I have several hubs and a blog you can go to and get actual intruction on cleaning windows.
Oh and by the way Dawn is environmentally safe and recommended by all window and solar film installers.