3D Printing Problems (extrusion has gaps) - Disco Ultimate

[FaramirTheGeek]

Hi All,

Mostly reader here and finally created an account to post an issue I can't solve. Only an owner of 1 month and I have read some advices on here that I don't understand (so asking for layman terms in explanations please).
Please help me troubleshoot this issue
Settings:
Printer: Dagoma Disco Ultimate (single extruder)
Plastic: Geetech PLA White 1.75mm
Nozzle Temp: 210C
Software: Cura Ultimaker 4.4.1
Size: 0.2mm
Speed: tried fast and slow

Hopefully from the pictures you can see the problem (I posted an example previous day successful print of the same object). I was using Geetech PLA and switched to Chromatik, then realising it gave no extra printing quality for higher cost PLA I switched back to Geetech. However upon this switch, I had problems! I also included the 2 main areas that I have tried to clean.I have fully disassembled the rear feed cog and it seems to be fine, it turns and feeds plastic I believe so I cant see an issue there. I have yet to take apart from the nozzle section (actually I tried but I couldn't find how to completely take it apart, but if part of the troubleshooting requires it I will find out how).Thanks in advance!