This article is adapted from the 2016 white paper "Fiber optic connections: check and clean first, then connect!" by Daniel Eigenmann, Reichle & De-Massari AG (RM). For more detail about Figures 3-11, please see the White Paper (RdM_WP_FiberCleaning0116_en_v1.pdf) found at https://www.rdm.com/usa_en/Global/Forms/Download-Form/(file_id)/69188. R&M (Reichle & De-Massari AG) is a global producer of future-proof products and systems for communication and data networks. The company’s close collaboration with certified partners results in pioneering connectivity solutions in the sectors LAN, Public and Telecom Networks as well as Data Centers. The Swiss family company stands for innovation, quality, and proximity to customers. More information can be found at www.rdm.com.