One thing seems certain about science and technology: it always seems to get better! Start with the "field proven" Combination Cleaning Process and then take it on the road. More than 1,000,000 successful operations say something pretty positive about "how to clean a fiber connection". Better yet, place CCK-1 in the equipment so "cleaning is always there".Too much to carry? Put CCK-1 in your pocket or it fits so easily in a test gear case. Great for DOT ops.Included is the SqR with an "MX" Pen (FW2150). There is a heavy-duty plastic bag keeps the pieces together. Combination Cleaning is used to clean all network and local fiber optic connections. It is the most reliable way to assure the connection will test or transmit.