You will need white vinegar, water, an empty spray bottle, and newspaper. It’s also a good idea to ventilate the area so the smell of vinegar does not become overwhelming.  Distilled water works best, as it contains the lowest amounts of contaminants and minerals.  While steel wool removes dirt and grime from your windows, the vinegar removes grease and oils. Using both will leave you with sparkling, streak-free windows. Fill a spray bottle with this solution. Make sure the solution is mixed thoroughly.  If you don’t like the smell of vinegar, you could add a few drops of essential oil to your solution to mask the smell. If you don’t have vinegar on hand, you can use lemon juice in its place. Don’t dilute it, just use straight lemon juice in place of the vinegar and follow the same steps. Evenly coat the window, but don’t use too much. You don’t want a dripping, sloppy mess. Do this systematically: start at the top left corner and work your way to the right, then move down and work from the left to right again.  Newspaper cleans glass better than paper towels, which leave streaky marks. You may want to wear gloves, as the newsprint could stain your hands. If you missed any areas, scrub them with a bit of the damp newspaper. Don’t spray the solution directly onto the window, as you would likely have to clean the entire window again. If you still have streaks on your windows, mix 2 cups (470 mL) of water, 1⁄4 cup (59 mL) of vinegar and 1⁄2 teaspoon (2.5 mL) of dish soap in a spray bottle. Spray the window and wipe it clean. This will help you catch any bits of dust or dirt left behind, and ensure your entire window area is clean. Enjoy your sparkling, streak-free windows!

Summary:
Gather your materials. Mix equal parts white vinegar and water. Spray the solution onto your window. Scrub your window with newspaper. Check for streaks or marks. Wipe down the window frame and sills.