For the filament clog, please follow the steps below.
1. Rotate and press the knob,choose Prepare\Change filament\Unload.
2. Wait for the unloading is done, then Turn off the power.
3. Be careful that the nozzle is very hot. Please use a Hex_wrench to take off the 2 screws beside the nozzle. (See the attachment IMG_2369.JPG)
4. Take out the Nozzle, put a thin screwdriver into the filament hole and push/press it to clear the filament clog.
(See the attachment IMG_2370.JPG and IMG_2371.JPG)