1/2 cup rubbing/isopropyl alcohol, 1/3 cup white distilled vinegar
Add water until the bottle is full (use a funnel, if needed). If you don't care for a vinegar scent (although it goes away once the surface dries), add a few drops of your favorite cleaning essential oil. I personally like lemon, grapefruit, or a germ fighter blend. This glass cleaner may be stored at room temperature.
distilled water
To Use: Spray a glass, mirror, or window surface with the cleaner, then wipe the surface with a cloth (microfiber is best for streak-free glass cleaning).