I’ve rarely used my favourite pen for natural history subjects – a TWSBI ECO-T with an extra fine nib – over the past year so it’s not surprising that the filler piston has got stuck.
I’m ashamed to say that I’ve never applied the silicone lubricant that was supplied with it for the piston the pen since I bought it in March 2018.
That’s over seven years ago. Oh dear.
I’ve also always used it with waterproof inks: first Noodler’s and in recent years De Atrementis. Perhaps a good soak will free it.
