Rinse the lenses with lukewarm water
Add a drop of mild dish soap
Gently rub the lenses with your fingertips
Rinse thoroughly with lukewarm water
Dry with a clean microfiber cloth
Use a microfiber cloth only for regular cleaning
Avoid paper towels, tissues, and clothing
Avoid toothpaste, baking soda, and abrasive cleaners
Avoid window cleaner, vinegar, and alcohol unless the lens maker allows it
Check whether the scratches are on the lens coating or the lens itself
Replace lenses if the scratches are deep
Take the glasses to an optician for professional advice
Use a hard case to prevent future scratches
Keep glasses away from keys, coins, and rough surfaces