Problem not covered in the troubleshooting guide

[JonRaymond]

You could but I think I would go the “piano” wire method like @RocketSled has suggested in the past.

Broken filament inside AMS - simple solution

I have a long piece of piano wire, like 1.5mm diameter, very flexible. I use that to push filament through the system. Diameter is small enough it gets past all the filament drive wheels and stuff.