Have you also found that just because it is blue, doesn't mean it leaves your windows and mirrors clean and streak free? And while Windex is better than most brands, I was still never all that impressed.
I have found that I do appreciate this easy cleaner for washing windows and mirrors. It is also not a bad way to go for cleaning stinky messes up.
1 part water
1 part vinegar
Pour the water and vinegar into a spray bottle. Put the lid on. Shake it up. Clean away!