This chapter outlines some of the most common printing problems that may occur when using fused deposition modelling and some beginning solutions to address them. The typical first steps to troubleshooting are updating entertainment design practitioners firmware and software and resetting all profiles back to factory default. Also consult the user manuals for their printer, slicing software, and they manufacturer for technical concerns. Delamination is the separation or splitting of layers during printing and/or cooling. Layers that delaminate can cause strength and stability issues in the final product. Observe if the extrusion seems troubled for the first two layers but normal for the third and fourth layers; this can be another indication. Solve this problem by adjusting entertainment design practitioners' firmware z-gap to allow more room between the nozzle and the build plate. The raft provides a larger surface area and often prints thicker and slower in order to enable the print to stick more easily to the plate.