Performing regular maintenance for the printer is crucial to ensure smooth operation and good quality prints. Regular maintenance also prolongs the lifetime of these hardware components.
One of the most important sections to clean regularly is the extruder and hotend and small debris can collect inside the extruder and interfere with its rotation.
Example of an extruder which was used for ~400 hours with no maintenance
Extruder Maintenance Guide: Cleaning and Lubrication - This guide describes how to clean the extruder for P1 series printers (also applies to the X1 series).
It is also recommended to do a cold pull at the same time, to ensure everything is clean: Nozzle/Hotend Unclogging Procedure