Use microfiber cloth and lens solution to clean the lens thoroughly. Don’t drop the cleaning solution directly on the lens, but put it onto the microfiber cloth. The next step is to mix 20 part of clean water to 1 part of 3.5 percent rubbing alcohol.
Dip another microfiber cloth into the diluted alcohol solution and rub it into the scratched area gently until those fine scratches disappear. Use a fresh, clean microfiber cloth to dry and buff the affected area.