Even if you do exactly the right things, like mixing vinegar with distilled water and wiping with newspaper, it's possible to end up with a frustrating streak or three. In that case, the simplest solution is to finish the job with a quick buff.
The best type of cloth for the job is a chamois or a microfiber towel, although a regular rag will suffice in a pinch. Again – step away from the paper towels, unless you enjoy the way lint looks when it catches the sun! Make sure the chosen cloth is clean and dry, and simply buff over the troublesome area of the glass when you're done cleaning it. Like magic, those pesky streaks will disappear before your very eyes!
As with most cases of household cleaning and maintenance, staying on top of the job makes it a whole lot easier. The less dirt and grime your windows accumulate, the less time you'll spend cleaning them.
- APEC Water. "Hard Vs. Soft Water Explained." 2018 (Oct. 17, 2018) https://www.freedrinkingwater.com/water-education/quality-water-hard.htm
- Cleaning and Washing Windows. Mrs. Clean. (Nov. 4, 2010) http://www.mrscleanusa.com/en/cleaning-tips/glass/window-cleaning-tip.html
- Whelan, Corey. "What is the pH of vinegar?" Healthline. April 17, 2018 (Oct. 17, 2018) https://www.healthline.com/health/ph-of-vinegar
- Window Washing and Glass Cleaning. Mrs. Clean. (Nov. 4, 2010) http://www.mrscleanusa.com/en/cleaning-tips/glass/washing-windows.html
HowStuffWorks gives advice on how to unshrink clothes.