Unfortunately, the provided reference only contains a short video excerpt describing what to do during the cleaning process of a steam generator iron, not the entire cleaning process itself. Therefore, a complete "how to clean" guide cannot be derived from this source alone. However, based on the available information, the video emphasizes the following during the cleaning process:
- Safety First: No one should touch the steam generator iron during the cleaning process.
- Process Completion: Wait until any beeping sounds stop before continuing use or storing the iron.
Without more context from the provided video or other sources, a comprehensive cleaning guide is impossible to generate.