Add alcohol, ammonia, and dish detergent. A funnel is helpful when adding the rubbing alcohol.
Add 1 drop of blue food coloring. This is optional, but it helps distinguish the window cleaner from a spray bottle filled with water.
Fill remaining space in the jug with water, leaving about 2 inches from the top empty.
Replace lid and gently shake the jug to evenly distribute the contents.
Using a funnel, fill the spray bottle with cleaning solution and clean away!
*The blue food coloring doesn't do anything to help or hurt windows, it is for safety reasons. I use one drop of food coloring to remind myself and others that the spray bottle is filled with cleaner, not with clear water.