So I bought a white Lamy Safari a few weeks back. I used up the blue ink cartridge that came with it already. When I ordered the pen I didnt order a converter just two black ink cartridges. Now I want to use the black in cartridge and want to know how to clean the pen. All the videos I've found show how to clean it but you need the converter which I didnt buy yet. Is there any way to get the old ink out without the converter?