Clean the windshield thoroughly with glass cleaner and a microfiber cloth
Mark the scratch area with tape so you can track progress
Apply a small amount of cerium oxide glass polish to a felt pad or polishing wheel
Polish the scratch in small circular motions with light pressure
Wipe the area clean and inspect the scratch
Repeat polishing as needed until the scratch is reduced
Use a glass scratch removal kit for deeper but minor scratches
For light surface marks, try a non-abrasive glass polish
For wiper marks, replace worn wiper blades and clean the glass
For very shallow scratches, use a baking soda paste sparingly and test first
Avoid using abrasive household cleaners or rough pads
Stop if the scratch is deep enough to catch a fingernail
Seek professional windshield repair or replacement for deep scratches
Protect the windshield by keeping it clean and replacing damaged wipers