M300 Bed Warping

having a bit of trouble with the bed on the M300

the bed seems to be warping, the other day i got 0.0 on each corner and 0.6 in the middle

any suggestions to fix this?

Have you cleaned under the build plate? How many prints have you run on it. Do you always run prints in the center?

hey yes i cleaned underneath with acetone

and also cleaned the bed

got it back to 0.3

and yes always print in the center