Which step is essential in manual endoscope cleaning?

Thoroughly brushing all channels to remove debris is crucial in manual endoscope cleaning because it ensures the effective removal of organic material, which can harbor pathogens. Endoscopes are intricate devices with multiple channels, and simply rinsing or washing them may not adequately clean these areas. Debris can form biofilms that resist disinfection if not completely removed. By brushing, you physically dislodge material that could lead to infection risks, ensuring compliance with infection control standards.

Other options, while potentially beneficial in specific contexts, do not address the core requirement of thorough debris removal as comprehensively as brushing does. Lubricating the endoscope or rinsing with alcohol might happen in certain protocols, but they are secondary actions rather than foundational steps in the cleaning process. Additionally, washing with soap only may not provide the thorough cleaning necessary to prepare the endoscope for further disinfection or sterilization.