What a beautiful pen! If there is a fibre stuck in the tines, flushing it out probably won’t help. You’ll probably need to floss the tines to get the fibre out. You can use a double edged razor blade (with washi protecting the one side so you can hold it) or get tine flossing sheets from Goulet Pens (or other pen stores).
Took me a while to figure it out. I tried flushing and also the sheets. In the end, it was the nib being scratchy. I used my mesh paper from goulet, 4 strokes on it and it solved the issue 🥲🫡
