The LensPen Mini Pro is great to throw in your camera bag for quick lens cleaning on the go. Use the retractable brush to remove larger particles of dust and debris then flip it around, remove the cap and get rid of any oils or smudges that remain. The Mini Pro is great for smaller diameter lenses including microscope/telescope/binocual/spotting scope eyepieces. Safe for all lenses, including multi-coated surfaces, GoPro Hero lens, other action- and Dashcameras, Digital Cameras, UV, MCUV, FLD, CPL, Polarizing Lenses & Filters, camcorders, binoculars, telescopes, microscopes, rifle scopes, night vision and more... Unique cleaning compound ( invisible carbon ) will not spill or dry out. Handy high quality retractable cleaning brush. Environmentally friendly and non-toxic. Long Life: 500 plus uses No messy liquids require, cloth, or tissues !