Yeah, heat soak. Instructions say to heat bed to 110*c with a wet cloth on top of it for an hour. let it cool and do it again.

Funny, the hotbed could not get past 90* with that wet cloth on it. Anyway its done. Re-calibrated the flatness and levelness of the bed. First 3 point manually level ( with screws )and then 6 point ( 5 perimeter and center ) , only one point of the 6 is 0.05 mm off. Check Flow ( Extruder Multiplier) at 95% for best single line width. Probably do dimensional calibration tomorrow as on a 50 mm square, one side is 50.12 and the other is 50.5 . I guess I like to tinker.

Right now, I like Printbite. Once the printer was fairly calibrated, PLA ( @ 50* ) it sticks well and actually releases when cooled back to ~ 30*. No more chiseling the part off.