A simple tool to assist with cleaning the grooves of the Z-screw.

Print two and "clamp" around the screw to clean in a single pass (the threads are offset to capture every second groove of a standard "T8 trapezoidal 8 lead, 4 start, 2mm pitch leadscrew" - used on a lot of 3D printers.

I prefer to use just one, so I can clamp a scrap of rag with my thumb (and then I make two passes, offsetting by one groove on the second pass).