Felix printers Pro Series Quick Start Manual page 5

Move the head to the middle of the bed manually so you can reach it better, also take of the top
cover. After that grab the filament with one hand and press in the spring with the other, now pull out
the filament with one swift motion.
Now the filament is out inspect the tip and see if there is any dirt or black particles on it.
Repeat this process until the filament comes out cleanly, after this the machine should be able to
extrude properly again, this method is also useful when switching materials.