I use this for all my windows
and it works great. If the windows are really dirty, I first spray then
scrub the windows, then spray again and use a squeegee.
1 cup isopropyl alcohol
1/2 cup vinegar
2 tsp Dawn dish soap
6 cups of warm water
Mix ingredients in large plastic jug and
shake well. Pour in plastic spray bottle. Shake prior to each use. Clean
windows and mirrors with soft cloth or newspaper. Store in cool dry place.
Shelf life is approximately 4-6 months. Keep out of reach of children.