It sounds like you are experiencing some common issues with 3D printing. Let's address each problem you mentioned:
PLA not flowing properly: If you have already checked and cleaned the extruder and nozzle, you could try increasing the nozzle temperature slightly and ensure that the filament is not tangled on the spool. It's also worth checking for any clogs in the hotend that may be obstructing the filament flow.
Stringing/unclean walls: Stringing can often be improved by adjusting retraction settings in your slicer software. Lowering the printing temperature slightly and increasing retraction distance can help reduce stringing. Make sure your filament is stored properly to avoid moisture absorption, which can lead to imperfections in the print.
Print offset: If your printer is experiencing print offset issues, it may be related to belt tension, loose connections, or even a misaligned bed. Check for any loose components and ensure that the belts are properly ...
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