By Juliet Jolly  By now if you’re a beginner, you’ve had prints left up or warp on the build surface.  Filament may stick to one side of the surface and not to the other or your head may be grinding into your build surface.  So what is wrong?  Most poor prints can be diagnosed as an unleveled build surface.  For those of us without an auto leveling machine this can be a true pain.  I consider the ability level adequately somewhat of an art form.  Leveling is also the most common mistake made by beginners and advanced users alike.  Weather its outright forgetting to perform the process or someone not following the proper leveling technique.   So when should I level my bed? When Should I Level? Level your bed every time before starting a new print even if you just finished a print and the next print uses the same settings.  The reason for this is because when you pop a print off the bed, this will cause the printer to change its settings.  Either leveling knobs will be moved or the