By jamming a small bulb syringe into a cartridge with the back end cut off, you can clean your pens quickly with no mess and you'll only need one syringe for the different types of pens. I can clean all my cartridge/converter pens with one bulb syringe and three cut cartridges - Lamy, international, and Pilot. I'm not sure if this has been shown here before but I thought I'd share in case it hasn't.