I haven’t used glue, hairspray or anything else since I got my COMGROW. The last few prints I’ve even cut out brim and the corners don’t warp on this plate. I print PETG and PLA mostly. I dedicated one side for PETG and the other for PLA. I have some ASA and TPU sitting in the draw but haven’t tried to print with those yet as I’m still working out my enclosure and vent.