Just in the process of fixing a guitar that was cutting out and narrowed it down to the Volume Pot.
Tried some abrasive wiggling to see if I could fix it this way – hopefully dislodge dust,
Nothing doing – started thinking maybe wd40 – none available plus it is a tad greasy.
What about the spray I have for my Vinyl records? That removes dust.
Couple of sprays later and a few wiggles – voila.
Fixed.
Note: This worked for me – I tae no responsibility for you – a guitar is one thing, an amplifier is another – spraying a conductible liquid into anything electrical is an incredibly stupid idea.