To provide the kind of faultless multi-gigabyte service promised by 5G, the fibre used in networks must be properly installed and maintained correctly. Therefore, it is important to address the need for the effective training of technicians. The deployment of 5G networks will only be successful if a skilled workforce is created who understand the correct way in which to carry out all of the processes. Contamination is a threat to optical networks and cleaning fibre is an important task to help a network achieves its performance goals. Therefore, engineers should be trained in ‘best practice’ cleaning procedures to future-proof each installation.