[sdiy] Restoring "feel" on pots?

DTK aurastar at cox.net
Wed May 16 01:00:21 CEST 2012

A friend of mine brought me a Mackie 1402-VLZ mixer (Mk 1) to take a look 
at.  His initial complaint was that the pots and sliders had lost their 
"feel".  I figured this was just due to age, but I agreed to take a look and 
see if there was anything I could do.

Before I even opened it up, the thing reeked of some sort of solvent.  When 
I asked him about it, he told me that he had some scratchy pots, and he 
sprayed a couple of them with cleaner.  It apparently solved the 
scratchiness, but now the action on the pots is not as smooth as it used to 
be - he said they were "loose" and not as smooth as they used to be.

Upon opening it up, it became clear that he sprayed EVERYTHING... every 
knob, every slider, and got a lot of overspray all over the boards in the 
process.  He used something he found at Radio Shack - MG Chemicals  Nu-Trol 
Control Cleaner, which was apparently recommended by one of the rat shack 

Any suggestions on what I may be able to do to restore these pots?  I've 
never heard of the product he used, but it obviously destroyed the internal 

What about the overspray?  Alcohol?  Or should I just leave it be?  It seems 
pretty oily, and I'm thinking it might be a good idea to get it off just for 
cleanliness reasons.  It doesn't seem to be conductive - the mixer works 
fine, even with it all over the boards.

If anyone has any tips they would be much appreciated - otherwise, I'm just 
going to give it back and tell him he's lucky it still works.



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