it contains on it mineral oil that is used in the production process. This is easily (and cleanly) removed by soaking it in a solvent like acetone for a short period of time. Swish it around in it a little then set out to evap off the solvent. Then its good to go.
In the past I have soaked it in acetone for an hour to remove any latent oils, etc. Then I rinsed it and let it dry, then torched it until it glows red just to make sure everything is gone.
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