Messed up infill without any changes

[JonRaymond]

Have you checked your nozzle thermal paste? Infill prints really fast and as the paste degrades/drys out the nozzle heater can’t transfer heat as fast to the filament which lowers the actual printing temperature of the filament.

Reference.

Thermal Grease: Small Cause -> Big Effect on printing results

Since most Bambu Lab printers are the same age, I can imagine that this problem could affect several people here in the forum. My printer has been producing imperfect prints from time to time lately. After 3 weeks of vacation I wanted to use it yesterday and this is what I got as a result: [IMG_0421 2] So I cleaned the nozzle according to the instructions and was in good spirits when the next print looked pretty decent at first glance. When the printer stopped extracting filament after a …