3

BrickLink only has that one match for conductive, so I'm guessing that's it.


3

While I can't speak of the handling of these parts, the possibility of receiving official replacement parts from TLG is surely zero. That leaves us only the second-hand market, which fortunately offers genuine LEGO replacement pieces, sometimes even in brand new condition. Note though, that even though the brittleness problem might stem from lots of play or ...


2

Any metallic or metal coated parts (spoon, aluminium foil, pen) should be usable with a contemporary touchscreen, although proper touch recognition still requires a human (or an equivalent capacitor) to touch the conductive surface. Therefore theoretically any of these official LEGO parts with exposed metallic surfaces (or similar ones) should function, ...


2

Generally for this sort of thing the recommendation is a "light machine oil" (the wording from the Hornby Maintenance sheets). These are "non-penetrating" and so won't damage the plastics which might happen with 3-in-1 or WD-40 style oils. This can often be found as "Sewing Machine Oil". Fleischmann (a model railway brand) sell ...


1

Petroleum based lubricants you need to be careful with, since they can act as solvents. Zhaph mentioned non-penetrating machine oil, this sounds like a safe bet. If you are in doubt, grab a gnawed brick and submerge it in a sample for a few days and see what happens before putting it on your precious train parts. Science! Second hand info: I have heard that ...


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