If you’ve ever used a fountain pen with a cartridge converter, you know sometimes they can be a bit of a pain to clean thoroughly. You flush and flush and flush but the water still isn’t clear! Well, maybe you just need to shake things up a bit. A brief yet confident shaking of your converter filled with water will get ink out of the ‘hidden spots’ inside your converter to give you a more thorough cleaning.
I recommend doing it with the converter outside of the pen, so you don’t accidentally go flinging your pen across the room. That would be bad. You can do this with any type of converter and it’ll likely help.
It works especially well in tandem with the use of a bulb syringe to flush your pen, which I show in this video.
You can also see how to completely take apart a converter for a thorough cleaning, especially if ink gets behind the piston seal, in this video.
Have you tried shaking your converter before?