Not much at all. Just a film or enough to cover the end of the applicator. This will be about an 1 mm by 1 mm sample. You will place the saliva in the center of the lens. It should not reach the edge of the lens.
Not much at all. Just a film or enough to cover the end of the applicator. This will be about an 1 mm by 1 mm sample. You will place the saliva in the center of the lens. It should not reach the edge of the lens.