Dust particles, moisture, oils from fingerprints, and even microscopic scratches can disrupt the optical path, causing increased insertion loss (IL), degraded return loss (RL), and long-term reliability problems. Modern optical fiber networks have transformed global communications by offering unparalleled bandwidth and low attenuation. As these systems transition from controlled environments to real-world deployments, their performance becomes increasingly susceptible to small yet impactful issues—chief. Optical modules must be handled with standardized procedures during application, as any non-compliant action may cause potential damage or permanent failure. However, during installation and daily operation, various issues may arise. The main reason for the failure of the optical module is the main reason for the failure of the optical module ESD damage caused by the deterioration of. In modern fiber optic networks, even microscopic contamination can have a measurable impact on performance.