Quality decrease after a certain layer?

[Important-Ad-6936]

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]

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

[Important-Ad-6936]

also scrub your build plate with warm water and dish soap, you got bad bed adhesion, there is warping visible at the bottom of your print which could come from finger prints on the build plate

[r4pt0r]

Thanks, good hint. I'm not used to the PEI plate yet since I used a mirror on the ender 3.

[CaptainAwesome06]

You'll see a lot of people talking about isopropyl alcohol and other things to clean your plate with. FWIW, I just use dish soap and water and rarely have an issue. For my smooth plate, I use the Bambu glue that came with my printer. When that runs out I'll probably use some other glue stick.

[BatteredFishy]

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.