"William Sommerwerck" wrote in message
...
The usual fix is to flush the pot with something designed for cleaning
pots
or contacts.

You might also try one of Caig's products.

A few months ago one of the UK hobby magazines published an email for a
company giving free samples of pot lube.

Nye synthetic lubricants.

Distributed by:

www.newgatesimms.co.uk

The sample was; Fluorocarbon gel 813-1

The sample was tiny, so it hasn't been possible to try it on a variety of
pots to see if any of the plastic parts suffer damage.