9. Shine windows with black tea.
Like Coke, tea has a chemical component that helps dissolve stains; the tannic acid in a string batch of black tea eliminates dirt and grease. To make it germ-killing strong, pour about 8 ounces of boiling water into a bowl with 3 tea bags. Let it steep until it’s completely cooled, then, pour the mixture into a spray bottle. Spritz your grimiest panes and watch them glisten!