I actually remove the CHISEL nib with my fingers (you can use a tweezer) and take note of how many cc's you are adding....for an empty ciao marker start by only filling one cc...best not to overfill.
This way is a bit quicker than the direct dripping on the nib as you don't have to wait for the ink to soak in....but is slightly messier than the booster needle method.
Don't wear new clothes and work over a protected surface....ask me how I know