Barbara Atlinburg wrote:
Our car sat out at the beach for a few weeks while we went on a trip with friends. When we got back the windows were covered with water spots from sprinklers and salt spray.
When we got home I sprayed windex on the glass real heavy. Then used a razor blade and slid it across the glass gently. Every bit of the water spots came right off. No scratches due to the windex made it slippery.
This is a method for disaster. One catch of the razor on glass and you'll have a scratch. It's totally unnecessary to use a razor blade on glass.