On Fri, 18 Mar 2011 10:11:42 +0000, Gary
wrote:

On 18/03/2011 00:17, geoff wrote:
In message , Gary
writes

I was in the repair industry for 30 years and the use of WD40 by the
public was great. It used to make a little problem into a big one
and give me lots of work..
Remember WD40 is an insulator. ( that's why it is used on car
ignitions) contact cleaner is not a insulator. it is a cleaner.

Basically an oil

and a good job it is an insulator, can you imagine the effect if it
wasn't and you sprayed a conductive film into e.g. a 1meg pot?

I often had the problem. Switches sprayed with WD40 became
intermittent. Sprayed with switch cleaner and they worked.

Same with pots. WD40 made them OC cleaner got them serviceable again.


For reference a major component of Servisol 'switch cleaner' is
petroleum distillate, a major component of WD40 is...petroleum
distillate. Of course petroleum distillate can cover a whole range of
products but you get the idea

http://www.farnell.com/datasheets/864997.pdf

http://www.wd40.co.uk/media/adobe/a/..._bulk_MSDS.pdf

I've completely trashed, or temporarily damaged a few pots and
switches over the years with all sorts of 'approved' products.

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