The official Bambu Lab wiki, in the article P2S Regular Cleaning and Maintenance Recommendations, says about “high-frequency usage (average daily printing ≥ 5 hours): Perform a full XY-axis cleaning and lubrication once a month; perform a deep Z-axis maintenance every 3 months.” The article goes on to explain Z-axis lubrication, but does not mention anything about “a deep Z-axis maintenance” procedure.
What is deep Z-axis maintenance? Thank you.