Hoya Evo Antistatic UV Filter - 49mm - Dust/Stain/Water Repellent, Low-Profile Filter Frame music_update_2021 5 to 10 drops per

5 to 10 drops per time is good enough

Buy it for your kids

and your bedroom light can't be completely covered by curtains

The strands are thin & soft to the touch

Hoya Evo Antistatic UV Filter - 49mm - Dust/Stain/Water Repellent, Low-Profile Filter Frame music_update_2021 5 to 10 drops perHoya Evo Antistatic UV Filter 49mm Dust Stain Water Repellent, Low Profile Filter Frame Hoya engineers have developed a new ANTISTATIC coating that acts like a force field around the filter to repel dust. Perfect for environments where dust is common, these filters require less frequent cleaning and maintenance than traditional filters. Additionally, the hardened, antistatic top layer is water repellent, stain and scratch resistant, and cleans easily