never heard of such of thing. Sounds like you got a real defective marker. I think the manufacturer would replace that or if you got it at a major place like Hobby Lobby, Michaels, Jo Anns, often the larger size stores will take them back as they can go back to the manufacturer with defective products.
I have a TON of copics and have never seen such a problem. Sorry to hear that.
Cheers, Holley
a new project posted everyday!
Holley's Blog