Not wishing to start an argument but........


One thing I have learnt over the years here at GSC, and on its predecessor forum GSM, is this - A lot of advice on maintaining electrical conductivity on your line is very much down to its disposition. I.E. Some lines are elevated from the ground, some are laid direct to the ground, with variable drainage, and even some just a bit above ground. Then there are long lines with "complex" configurations and alignments to maintain and the short simple ones and the ones in between. And not quite last nor least, what's your local climate like and is your line predominantly in full sun, part sun, mostly shade or just indoors ? There is one more the bit, at what point and how did you start clamping it up, if at all, and what prep' did you do to the track ends/fishplates....at all stages. Mixing all the permutations of all of this will finally affect the rate, if any, at which your line's continuity of electrical conductivity will ultimately degrade. Not easy.
So, if like me, you started 23 years ago with fishplates and paste and as my line grew swiftly I went to "overjoiner" clamps (Hillman). Then I continued with direct to rail (both Hilman & Massoth), adding in more of the magic "paste", you might have a particular take on the subject. Some solder might have got involved too. Do everything you can to make sure every bit was clean and bright before you started connecting it all up and do everything you can to stop water/dirt ingress to those rail joints. Just because it's got a bolt/screw in it does not mean the other bits of metal attached are not involved in the process or that bolt's/screw's duff spec' won't screw it all up.......And in the end you then realise its was all a bit futile and after and 18 years you give in and decide to go all battery power

(and/or live steam

)
Oh, and railhead cleaning, the other bit where your loco will actually get its electrons from. Don't talk to me about LGB track cleaning locos, no good on a full shade line like mine. And their track cleaning rubbers, great indoors and for a bit of in session "spot" cleaning but too fragile for a good full track railhead scrub. Trust me. But I did use one of their 50050 track cleaning attachments fitted to a wagon, in a consist standard practice.while my rails were live. Very useful, in my situation. The wagon they were attached to in more ways too.
It's all a bit horses for courses really. No right or wrong, just down to what you run on and how you keep it running. And my line is a "worst case scenarioh" here. Sorry, gone off on one a bit there, no offences intended. Quite theraputic really. Rant over