Eml synthesizers

Hello.

Does anyone here know the best way to clean and lubricate EML-400 sliders?  
They're Stackpole 5k Lin and 50k Lin.  I think they used the same ones in 
the EML-500.

They used a product called "rose oil" at the EML factory which was 
recommended by the slide pot manufacturer. Anyone know about this stuff? I 
haven't been able to find a source for it.  Googling "rose oil" results in 
lots of pages about what looks like a totally unrelated product.

Someone recommended using regular petroleum jelly for lube but I don't know 
if that would be a good idea.

Someone else recommended using Archer contact cleaner from Radio shack but I 
wouldn't.

Thank you!

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