While in line at the grocery, I let a lady go ahead of me, because I had many items and she had only about 20 boxes of Corn Starch....I asked her what she was going to do with all that corn starch. She said she was a professional window cleaner and it was the best thing she'd ever found to make the windows sparkle.
Here's how: Just dilute a little bit in a bucket and make a solution. Take a clean terry cloth and dip into solution, wipe over mirror or window. Then take a clean/dry terry cloth and wipe excess. Turn cloth to dry side and polish off.....you'll see it sparkle and never buy that blue or green stuff again. Or use smelly vinegar!!!
Have fun! LOL
LoisLaneTX