Rinse the lenses with lukewarm water
Add a small amount of mild dish soap
Gently clean with a microfiber cloth
Dry with a clean microfiber cloth
Use a lens-safe scratch remover if the lenses are plastic
Apply a tiny amount of non-abrasive toothpaste to the scratch
Rub gently in circular motions with a soft cloth
Rinse thoroughly and dry
Use a baking soda and water paste for light scratches on plastic lenses
Apply the paste gently with a microfiber cloth
Rinse and dry completely
Try a commercial eyeglass polish designed for lenses
Follow the product instructions carefully
Replace damaged lens coatings if the coating is peeling
Take the sunglasses to an optician for professional repair
Replace the lenses if the scratches are deep
Avoid using paper towels, tissues, or rough cloths
Avoid abrasive cleaners, acetone, or ammonia-based products
Store sunglasses in a hard case when not in use