We like the Lensbaby Lenspen Pro so much, we use it ourselves to clean the Lensbabies in the final stage of the manufacturing process. A couple of quick swipes and you have a crystal clean optic with no sprays, chemicals, liquids, residues, or hassles. At a highly portable 5 inches long, the Lensbaby Lenspen Pro is safe and highly effective to use with your Lensbaby and other camera lenses.