Long time lurker, first time poster: I recently bought a Domain Lion 305, and have filled it with the Blackstone Daintree Green - I love both pen and ink, but I've noticed that after being capped for a while there's a fuzz at the tip of the nib that looks almost like iron filings on a magnet - I think what's happening is that the ink has evaporated off the tip and left the pigment residue behind. This happens over a few hours. Any suggestions for what I can do so that I don't have to clean the pen every morning? Is the ink to "thin" for the pen?