The end should be cut flat (not angled), the filament should be fresh and smooth (not wrinkled from going through the printhead), and the thickness should be consistent (1.7-1.8mm, if possible for you to measure). If you have only seen the problem on one or two filament rolls and can remove the filament from the monitor, please examine the part of the filament that was stuck. If you have experienced this issue across multiple filament rolls or cannot remove the filament from the filament monitor, please unscrew the monitor from the back of the printer (via the two screws you see on its top) and send us a clear photo of the inside via the form at the end of this page. The first step is to determine whether the problem is with the filament or the monitor itself.
