Needed:
-A lenght of pipe of at least 7 in long, at least 1 wide. On of the sides needs to be sealed. For safety, the other should be sealable too. (I have been using a long prescription container, but I guess that any other light pipe would work.)
-Toilet paper.
-A sock.
1) Take some toilet paper, put a layer at the bottom of the pipe.
2) Put the pen to clean in the pipe, in such a way that the nib get buried in the paper. (If you have also rinsed the cap, put it in too, top up.
3) Close the pipe (if it has a cap). Slid the pipe in the sock, so that the bottom (where the nib is) is in the toes of the sock.
4) Holding the sock from open end, spin gracefully.