Among the 1001 uses for Vinegar, it is also good for cleaning glass, mirrors, and windows. Simply mix 1 cup vinegar (regular store bought white vinegar) with 1/2 gallon of water, add a touch (1/2 tsp) of dishsoap.

I also used a squeegee I pickedup on Amazon for $18:
https://www.amazon.com/gp/product/B09...

Alley Picked shirts like the one I'm wearing:
https://simpletoncreation.com/collect...