Hi, I have a da Vinca junior and have been using it for a few months with good results. Whilst removing some filament it broke at the feeder. I pulled out the tube and removed the filament piece and reinserted the tube. Since then I cannot get any new filament to load. It does not get past the gears into the tube and just keeps grinding away. I must admit I have not cleaned any parts of the printer yet and probably should. I am still quite new to this and any suggestions are appreciated.