Level the print bed
The most common cause of starting with spaghetti prints is that the print head is too far away from the build
platform. When starting a print, the print head needs to be very close to the build platform so that the little snail
trail of molten plastic gets squished into the build platform to create a good bond.
The best way to level your print bed correctly is to follow these instructions from Triffid Hunter
Take a sheet of paper and place it on top of your build platform.
Move the print head to one of the four corners of the build platform and home the z-axis. This should “pinch” the
paper between your print nozzle and build platform.
Wobble the piece of paper and adjust the height of that corner using your thumb screws. Keep raising the
platform at that corner until you can just feel a bit of tension on the paper, as the print head and build platform
pinches close on the piece of paper.
Repeat for each of the three other corners of the build platform. Aiming to get the tension on the paper roughly
so maximum gap between nozzle and hot bed is thickness of paper in all areas while at first it is on home position.