Hi All, I just bought some Waterman Serenity Blue ink and it looks fantastic, except in a PenBBS 308 which I also got around the same time. The pen was used and the prior owner didn't complain about any issues. I got it for free as part of a bundled deal (the other pens sold in the bundle work perfectly, so I presume no wrongdoing by the seller in any way).

The ink in my TWSBI look very dark and strong. The PenBBS look faint on some strokes, especially the top of the Bs and S. I understand it could look slightly faint as it's a fine point, but it's inconsistent. I've snapped some photos of the nib below. Any thoughts on what it could be? I cleaned it twice and let it dry overnight both times. I also used it rather heavily this week to ensure there wasn't water stuck in there or something else. Would appreciate any insight. Otherwise I may give this one to the kids.

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