To make this easy, choose a small window (but not too small as that can get tricky).
Pick a time in the day when it is not sunny. When sunshine is on the windows it gets easier to leave marks.
Start at the top, then work down. This way any drips will fall as you work down.
Only use a little bit of cleaning solution. If you use too much it can get sticky.
Use a clean cloth to wipe the edges once you have cleaned the window, this will give it a professional look.
Finished, did you get it done in under a minute?
The creator of this guide has not included tools
Sydney, North Shore