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Jdoc,

I use clean paper towels to wipe off the blades. A dirty rag can transfer grit. If the blade is covered in slurry them maybe it needs a rinse. Slurry contains abrasive particles.

Are...

What part of the razor are you scratching? Do you have pics?

Are you shaving with these, or selling them?

By the time you are done with 12k, the edge should be a mirror. 8k should be near...