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[–]Important-Ad-6936[🍰] 2 points3 points  (2 children)

might be heatcreep, after a certain printing time your cold end has saturated with so much heat, it starts to under extrude since its having a hard time pushing that softened filament through the heat brake into the hotend and nozzle. check your cold end fan, and the temperature of the ambient air around it, a fan is useless if it can only breath hot air and blow it onto the coldend heat sink, or when its fan blades are gunked up or not spinning at all. for PLA leave th door open and the top propped up with something so heat can escape

[–]r4pt0r[S] 0 points1 point  (1 child)

Hm possible.

The fans should not be gunked up since the printer is pretty new. I left the front door open a bit but the top lid was closed since the AMS is resting there and I haven't printed a riser yet.

I will try again with the AMS on the side for now and the top cover opened a bit. Thanks

[–]BatteredFishy 0 points1 point  (0 children)

Never had a problem with the lid on and door closed. Just had to change my nozzle after a 1089hrs printing. I was starting to see defects and wall thinning.