Kodak SR series User Manual page 47

Care of Lenses
The surface of photographic lenses have thin coatings that reduce chromatic
aberration, unwanted reflections, and other distortions. Extra care should be
taken to protect this fragile coating.
Protect the lens by installing a lens cap when you are not using the camera.
Brush the lens gently with a camel hair brush or loosely folded piece of lens
paper to remove dust particles. For stubborn dirt use photographic lens cleaning
solution and lens wipes. Never rub the lens with direct pressure or drop cleaning
solution directly on the lens surface.
5.1