I would flatten with a coarse or extra-coarse  diamond plate.  When flat, 
the sharpening surface would be clean.  No  further action is necessary.

Cheers,
John

John M.  Johnston
There is a fine line between hobby and mental illness. Dave  Barry

In a message dated 12/9/2011 12:46:49 P.M. Central Standard Time,  
docholladay0820@g... writes:
I know that we had some discussion not too  long ago about cleaning oil
stones.   

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