kiwi76

Hello, I have an Ulitmaker now for a while and done quite a few prints but lately before every print I have to preheat the nozzle and then pull the filament out. Cut the first part off and then feed it back in to make the printer work. also when I print I get a bit of overrun like the nozzle still extracting that I have to clean up. My question is the nozzle to work and do I need to get a new nozzle and the little white part or is there another problem?