Hi. A while ago I bought a bottle of Lamy Vibrant Pink ink to use with my Safari. I have just bought a new nib for it and I'm also changing the ink colour. I've changed inks in my Safari before, but this time it was different. I found the pen really difficult to clean out, and I even had to totally dismantle my converter to get all of the ink out that was stuck behind the piston. Has anybody else had problems like this? Thanks!