How well have you cleaned it? The nib could need small adjustments but if you say it's smooth it could just be the feed isn't clean enough or saturated enough.
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Yes, cleaning the nib may help, as well as cleaning/flushing the feed of the pen itself. If you have tried a few inks and types of paper, I would imagine it's indeed a faulty nib, but I would thoroughly clean it first. Just to be sure there is no residue left from the manufacturing process.
You can use lukewarm, water to do that. If that is not enough you may add a tiny drop of dish soap (like a tiny, tiny amount of it, noticeably less than a drop) and rince it again. After that, you should let it dry thoroughly. I often let mines dry for a few days but unlike you I'm in no hurry. The pen will dry faster if you remove most of the water, obviously, but don't try to heat it to accelerate the drying process, as you risk damaging it.
I've cleaned it twice using dishwasher soap and water, the usual treatment. With full disassembly. But if there’s a more thorough method I'll be glad to try.
No need to, imho. If the pen is new as for a replacement (of the entire pen, not just the nib).
Sorry, not sure what you're saying about the replacement. Should I look into replacing the entire pen or just the nib?
My bad ;)
I would ask for a new pen since it is brand new and since there is no certainty the new nib will fix the issue.
Okay thanks! I guees no use in taking the risk. I've started the return process.
The tines may be too tight so my suggestion would be to floss the tines. It should be no problem if you have a brass shim. It's worked wonders on a number of my cheaper pens to fix ink flow. Although I have noticed that the flow is slower on my 9019 as well.
Huh, excellent idea. I got nothing to lose so...
Okay that also didn't work.