Always handle optical filters by the edges, never touching coated surfaces. For cleaning, use lens tissue with reagent-grade isopropanol or methanol in a single-pass drag wipe technique—never circular motions that can spread contamination. Knowing how to clean SFP modules, performing routine SFP maintenance, and maintaining your optical module will avoid downtime and prolong the usable life of your equipment. Though dust and. This is a short video of cleaning a Ball Lens. Upon optical inspection, if non-contact optical interfaces, such as a ball lens, are identified during an inspection, do not continue to inspect, or attempt to clean. While there is a wealth of information available online, particularly on suppliers' websites, I want to consolidate all the knowledge I've acquired over the years working with lasers, fiber optics, and other optical. They need careful handling and thorough optical component cleaning to work well and last long. Over the years, working in optics labs and cleanrooms, I noticed that skipping this important step can mess up data, lower power and lead to expensive fixes. What Are the Real Costs When SFP Modules Stay Dirty? What Are the Real Costs When SFP Modules Stay Dirty? What Tools Actually Deliver Results.