Thread: New DMT8EE - ruined?!

I think it's just gunk from the Chinese 12K you got on that.
As already stated, you can clean it off with a stiff brush (old tooth brush will work fine) and a regular kitchen abrasive for cleaning dirty pots and pans.
From the DMT website: "If you are concerned that the diamond may have worn off the stone, rub the sharpener against an old glass jar. If the sharpener scratches or frosts the glass, then there is diamond on the sharpener ready for your sharpening needs."

Good luck,
Bart.