I have an airwolf HD printer. the extruder keeps clicking while trying to extrude chipping away at the filament and giving inconsistent extrusion. I have completely cleaned the nozzle and have also taken the extruder apart and cleaned the bolt from all the filament particles. it does this even by just extruding with the bed far away and it's always in intervals. I have no idea why it keeps doing it. Any help is appreciated. Thanks