Messy filament all over print.

Printing Nylon-Carbon filament on a Qidi X-CF Pro.

I've tried temperatures from 260 - 290, and I'm now down to 25mm/s without much improvement.

Any advice?

Thanks.

I have the same printer and I found that using Prusaslicer improved print quality over the Qidi slicer. I used the same start and end code from the Qidi slicer.

My X-CF pro has been very inconsistent in output and it has not been unusual to get similar results to you, can only suggest that you email Qidi with photos and the STL and G-Code.