V3 KE first layer issue

Hi there!

I’ve been using my Ender 3 v3 KE for almost a year and for the last 3 weeks it has been failing with the first layer. I’ve checked many posts from this forum and other resources trying to find a fix, but it’s still bad.

I print with PLA (usually SUNLU, Anycubic or Elegoo) and use Creality print as a slicer.

I’ve tried several solutions:

  • New PLA+ (in this case elegoo)
  • Run auto calibration and auto levelling
  • Reduce z-offset in Creality Print Slicer to set it to -0.05
  • Tighten all the screws on the hotend
  • Change the nozzle to a new one.
  • Clean my print bed with window cleaner and IPA
  • Change temperature for bed (60 to 65) and nozzle (190-220, even print a temperature calibrator to check the best one)
  • The first layer is perfect on some points of the bed, but on others it seems that the PLA is not adhering.

I don’t know what the problem is.

Thanks for your help!