How to Clean a Window
Step 1 - Wet
Start by using a wet cloth or T-Bar to wet the entire glass surface. A water/dish soap solution works best. Perhaps some of the dirt comes off during this step but the purpose of this step is not to clean the window but rather wet the window with your soap solution. The dish soap helps to break down the particles that you are trying to remove from the window while lubricating your squeegee motions without leaving streaks.
Step 2 - Scrub
Step 2 is the longest and most important step, this is where the cleaning happens. Using a rough sponge, scrub the entire surface until smooth. Any stubborn dirt may be scraped off with a razor during this step ONLY IF THE GLASS IS NOT TEMPERED. If a razor is used the glass must be re-wet afterwards.
Step 3 - Squeegee
Step 4 - Detail
Step 5 - Screens + Tracks
Wipe off using a wet rag the outside rim of the screen and netting. Open/Take apart window and remove plastic liner that runs along bottom of the window to vacuum and wipe out track. Once finished replace liner and put window back together.