Users can use Finger Cleaner by filling the product with physiological saline solution or water. Now that the fingers are disinfected, the fingers can be used to wear or remove the contact lens. The lid of this Finger Cleaner also functions like a container for contact lenses. Insert two fingers (the thumb, index finger) into the two designated slots at the top of the Finger Cleaner, then move the fingers up and down. With a microfibre filament brush planted inside and arranged in an oblique manner, users can clean their fingers thoroughly.