while but back at it and decided to take MH Builder's PLA for a spin and having issues getting a clean space guy. I have tweaked my "Z" so I have good adhesion to my Buildtak surface, using default settings from MH for the flow etc.
Three attempts after printing a clean "cube" test, the one on the left is 200 deg, middle is 205 deg and the right is 210 deg hot end temp settings. Cooling fan is running 100%
This definitely looks to be a cooling issue. I agree with Martin though, does this happen with every material? Do you see both fans spin when the part is printing?