Using the Bondtech BIQU Terminator Extruder is easy. First, make sure it's properly installed on your 3D printer. When you're ready to print, feed the filament into the extruder and start your print job. For best results, use high - quality filaments. As for maintenance, clean the extruder regularly to prevent filament jams. Check the gears and moving parts for any signs of wear and tear. If you notice any issues, stop using it immediately and get it fixed. Also, keep it in a dry and clean environment to avoid any damage.