Hi Transistor,
I sit next to the Dremel 3D customer service team and ran your question past them. Their reply is that we never recommend putting a pin or anything through the nozzle tip, if you have a clog we have a special tool to push through the assembly and or motor but not the nozzle tip. Your best bet is to contact the Dremel 3D support team direct at (844) 437-6533.