I have a set of technical pens, Rapiographs, and they are the biggest whiney babies of the pen world, I swear to god. Today, as I'm drawing details onto my final studio drawings, they are cloggy and spitty, and my hands are covered in black ink. I do need to give them another go through the ultrasonic cleaner, but I think some of the finer nibs need to be replaced, especially the one in which I made the collosal mistake of using white ink -- official Rapidograph ink, but it turned out to be cloggier than the fine black ink that's the standard.
I'm on the edge of just trashing the set and replacing them with Rapidoliners, which are the same basic thing but with disposable ink cartridges that incorporate the nibs, so every time you refill you get a fresh, unclogged nib. I am about to walk up to the campus store and see if they have anything in a double-ought (0.30mm for you metric types) technical pen for a reasonable amount, because mine just, well, blew up. I wonder if you get a discount for coming in covered head to toe in India ink.
Also in the misbehaving studio supplies this year are the metal 18" ruler with cork backing that has been shedding the cork backing despite repeated re-gluings, and the 36" metal straightedge that... well, who knows what happened to it, but it is no longer in my bin of rulers, nor is it anywhere in the studio, so all I can imagine is that it has made its escape after years of putting up with me using it to knock objects off high shelves. Oh, yeah, and the parallel rule for my drawing board (which, admittedly, I never use any more) snapped a connector and is no longer parallel. I'm trying to decide if the repair is worth it.
Of course, everything has to break or need maintenance right when we're 24 hours from deadline in studio.