As someone who lives way down south, and incidentally spent a brief but memorable bit of time helping monitor the ozone...

Maybe try some of the new stuff, and if it works OK, take the old stuff to haz waste next time there's a good opportunity? I understand that the can of CFCs is a "drop in the ocean", but the mindset change is more significant.

Fair enough. In my defense, I've had the same can for almost 40 years, use it judiciously, and guesstimate that it's kept at least a couple of thousand US$ worth of electronics in service that would otherwise have needed expensive repairs or, worse, been disposed of and replaced by new stuff, with all of the environmental consequences those entail. But I will explore alternatives, and I see that there's a new version of the product (Chemtronics Electro-Wash) that doesn't have CFCs. Thanks for the nudge!

All good! I think we can all appreciate the proverbial giants who've lifted us to where we are, and simultaneously acknowledge that they left some nasty shits here and there.

Good reminder to clean the pots in my amp too - I've got an old Leak Stereo 70 that occasionally makes some odd noises or drops one of the channels, usually it gets sorted with a firm smack.

If you find something new that works as well then please let us know!

that could certainly have helped though it was a bit beyond crackling, a channel would drop out completely.

Maybe if I had tried that several years earlier the lubrication may well have extended the pots life.

Silicone contact cleaner works also very well for old pots.