Nozzle to close
2. Nozzle too close to print bed
I. Z-axis offset
Even minor raise of the height of nozzle can often help. A lot of printers have in their system settings possibility to set a Z-axis offset. In order to raise the nozzle away from the bed, you have to move the offset settings in positive value. The contrary process – negative offset value will help you when your prints are not well sticking to the print bed.