Printing issue - Filament stuck together

Hi since I received my Snapmaker, I was successful in printing the keychain just to ensure the printer is working per design. Since then, I have not been using it. Today, after performing the calibration, during printing the filament would stick to the feeder head and ruin the whole print. I have tried to calibration and clean the head a couple of times with no success. What could be the cause?

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When asking for help, can you please provide all the information that you have. What were your print settings, what temperature for the bed and extruder?

Have a good weekend