Whether you're out of Windex, or just don't like using harsh chemicals around the house, black tea is surprisingly adept at cleaning windows.
We already knew that black tea can work wonderson your skin, but Mother Nature Network claims that the tannins and acidity of a strong cup of black tea can help you achieve spot-free windows too. All you have to do is brew an extra strong cup of black tea, pour it into a spray bottle, and use it just like you would Windex. The result is similar to what you'd get from a commercial cleaner, at a fraction of the cost. Be sure to check out the source link for more info.