After retracting the filament until the hob bolt doesn't make contact, one of two things happen:
- There's a long thin string of filament going down towards the nozzle. I try to manually pull the filament out but this string prevents it.
- There's a thicker blob of filament that won't go through the hole in the top guide.
What I end up doing is to get into the space between the hob bolt and the upper filament guide with a pair of flush cutters. Then I have to fish out the lower pieces with tweezers and compressed air.
What am I doing wrong?