Have you ever cleaned your windows and still ended up finding they are all streaked? How would you like to clean your windows and find that they are crystal clear?

The other day my boss came into the classroom to clean the windows. Our school is a very old building. The windows are blotchy with hard water stains.  She walked in with a a bucket of warm water with an onion cut up in it. After the onion sat in the bucket for 30 minutes, she took a rag wiped the solution on the window and let it s...