So I have been using my Kaweco Sport Medium for several weeks and it has of a sudden started leaking from the feed - I think - the section and the inside of the cap (cap esp.) have ink on them when I open it up. I went with the eye dropper fill but not sure how that could be the issue - JIC I cleaned and re-filled to no avail. I did push the nib into the feed CAREFULLY from the sides and felt like there was a bit of a gap - but the leaking continues. Not an expensive pen but I love how it writes and this leaking business is ruining the experience! Don't know alot about Kaweco nibs so hate to start fiddlin' about as Pete says - anyhow big thanks if you can help - cheers!