[ORAWA01]

Having said that, I tried WD40 to cheap vintage Transistor radio with crackling noise on the volume pot, and it cured it. Now no pops and bangs when switching it on, and rotating the volume control = it got noiseless and quiet as new.

So, maybe WD40 can do the job provided it is not too excess amount which will spill over to other areas than the problematic part, and where plastic parts are connected by friction such as into tubes or bars.

WD40 does work - thanks for your idea.