It can be frustrating to prepare your 3D model, start 3D printing, only to realize that the first few layers of the print are sagging or just plain messy. Sagging of the first layers of the print is ...
Most 3D printing advice focuses on the machine, the slicer, or the file, because those are the parts people can see changing in real time. A bad first layer is obvious. Stringing is obvious, too.