It could also be Stepper drivers V-Ref is too high causing the drivers to over heat, this intern allows the extruder to misstep and ultimately clog.

My 3D Printers have a factory V-Ref of 0.800 volts this caused me many headaches until I finally reduced V-Ref to 0.695 volts.
Added heat-sinks to Driver chips a cooling fan to ensure the controller and all components operated in a recommended temperature range.