Quote Originally Posted by MeoWorks View Post
The clicking is happening when the filament is slipping on the hobbled bolt's teeth. Eventually it'll grind into the filament and all extrusion will stop. Depending on what extruder you have, you should look into either tightening or loosening the idler or upping your temperature or slowing your print speed.

If it's a clog, just bring the hot end to 180C, unscrew the nozzle and clean it out. Acetone dip will eat ABS and burning will crystallize PLA and make it easy to scrape out.
It's probably a clog, but before you do the cleaning try to push the filament by hand with the hotend at printing temperature; if you can't push it, or it takes an unreasonable amount of force then yes, it's a clog you need to clean.
If you can push it though there's something wrong with the stepper driver (not enough current, overheating, gremlins), your stepper motor (bad wiring, seized bearings, gremlins) or your hobbed bolt/gear (gremlins for sure).