Don't clean it! My original suffered that fate, albeit for good intentions. My wife and son decided one year to take my 1842 musket to a gunsmith and have it "restored". They paid a lot of money to have it cleaned, refinished and the barrel blued! UGH!!!! I have since "restored" it from the vandalism that happened, but could never get back the old "dirt and grime" (their words) that it had attained over 160+ years of life. I have since, kindly and gently, explained to them why you don't touch someone's stuff, even for what you consider a good reason.