Keep your optical surfaces clean with the Sensei BOC-CK Basic Optics Care and Cleaning Kit, which contains a pack of lens tissues, a microfiber cleaning cloth, a blower/brush, cotton swabs, and lens cleaning fluid. This kit can be used to clean a variety of different optics and glass, use the blower/brush to initially remove dust on the surface. Sensei recommends applying a small amount of the alcohol- and ammonia-free cleaning fluid directly to the microfiber cleaning cloth or lens tissue. Then, gently rub in small circular motions to remove stubborn smudges or fingerprints on the glass. The cotton swabs provided are used for those hard-to-reaches areas where the cloth or the tissues cannot reach, such as the crevasses or corners of a lens.