I print the same objects on this R2 continually. When one roll is finished I put in another. I noticed that the print quality began to degrade at the end of a roll. When I loaded in the new roll it appeared that the filament loading was too thin coming out of the print head at 210C (0.49mm). I removed the filament and ran a 4mm needle up the nozzle and re-ran the filament load. This time the filament came out at .79mm. I have added a clip on filter to remove any particles from entering the nozzle with the filament. I am looking for anyone with experience in this. When it happens is it good enough to run a needle up the nozzle or is a short term solution with the nozzle needing to be replaced?