First layer is dirty... How do you adjust?

[Yuki_Kojima]

hello.
I’m using ASA-CF filament.
As shown in the photo, the first layer will be printed.
I have tried the calibration of K2plus.
When I checked the bed level, it was just like the picture.

I can’t find a way to solve this problem. Can someone help me?

[Bill.b]

Generally this is because the Z offset is too low. I have to change the z offset on my K1C by 0.05mm when I change from PLA to PETG.

Bill