On the 342, often first the feed together with the nib can be carefully pulled out; subsequently the chamber can be thoroughly rinsed; with success, the piston mechanism does not have to be further disassembled. A complete disassembly requires suitable tools and is not trivial – in the specific case the unscrewing succeeded with a coincidentally available tool. Economically, sending to a specialist like maxpens.de hardly pays off with a 342, since market prices for used examples are around 10 euros and the postage alone exceeds the value; exceptions are rare features like a music nib. Alternatives are to leave the fluff, to acquire a replacement 342 or to seek help at a collectors' meet-up.