If you are having first layer issues, calibrating your nozzle gap (or z-gap) could be the solution to your printing issues. If the nozzle gap is too small, you may be hearing a clicking at the beginning of your print, or you may have a first layer that appears "smashed" or too flat. If your nozzle gap is too large, your first layer may print in air, or just have poor bed adhesion. If you have 1st layer issues multiple prints in a row, try following these directions to calibrate your nozzle gap.