Please help! I recently bought the A1 and the AMS, and I’m using the AMS with a single spool. The main issues started with this model: https://makerworld.com/models/73599 The printer would complete the honeycomb part, but when it got to the infill, it would do one of two things: • The extruder would spin without extruding any filament, or • The extruder would attempt to spin but make a “click click click” sound without extruding anything. In short, it was doing air printing. I tried dozens of different solutions for hours, and eventually I had an idea: I disabled filament retraction in Bambu Studio and the print succeeded! I suspect the honeycomb part involves a lot of retraction, which might deform, damage, or even break the filament, causing the printer to stop extruding Unfortunately, I thought this was just a particularly difficult model, but the same issue also happens with other models with few retractions. I also tried loosening the extruder screw to see if it would help with retraction enabled, but it didn’t solve the issue. So now I’m wondering: is it possible that a brand new Bambu Lab filament is so fragile that too many retractions clog up the printer? Another thing you can see from the second photo (where retraction was disabled) is that even though the bed is well-leveled, the first layer looks very “porous.” THANKS FOR THE HELP