I have a CR10S Pro and have issues with my first layer. The layer sticks well but it is not completely filled. One can also say that is is a bit underextruded Please see attached image for details.
All other layers are looking great!
I already played around with the settings for First layer width (up to 200%), First layer height (down till 90%) and also applied a negative z Offset to the whole print (which helped a bit but not enough. Also I played with the extrusion factor but wihout success.
Some of the settings made it a bit better but not really consistently. I have no idea left. Oh yeah, I forgot to mention: the nozzle is clean (its a new one).
Does anybody have a good tipp on specific values for settings that I could try?