I always keep the print bed at a minimum of 60 even with PLA. Sunlu PLA suggest a heated print bed. I would use a brim and heat the bed to 60. Watch the brim and adjust your Z offset to make sure you are printing close enough to the bed.

What temperature is your bed set at? What type of bed surface are you printing on?

Does anyone have any suggestions for Cura settings for the CR-10 Max with a Swiss hot end and a 0.06mm nozzle? I read somewhere that you should increase the temperature settings by about 10 degrees for the Swiss hot end.

Thanks