Newspaper...with the environmentalists changing news print to a soy based ink I find newspaper to now leaves a film on the inside of the windshield. That cured me of using newspaper, I currently am using a good quality paper towel or a microfiber cloth, and there are different grades of these.
I wondered why newspaper was suddenly leaving streaks when it didn't before. Learn something new every day.
I asked the window cleaners at my Mother-in-law's condo in Ft. Myers how they got the windows so clean and without streaks. "Distilled water with 2-3 drops of Dawn dish detergent in a spray bottle". I tried it along with a micro fiber towel and sure enough it works.