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<p>[QUOTE=&quot;kidkayt, post: 315906, member: 7275&quot;]I generally leave mint issued coins in their capsules, with the notion that if there is a speck of</p><p>dust on the surfaces the grader will identify it as such and it won&#039;t affect the grade.&nbsp; Wiping</p><p>the coins seems like it would introduce a new step in the minting process, which may remove</p><p>the speck, but leave more dirt, finger oils (which can and do diffuse through the fibers), and corrosive</p><p>chemicals such as&nbsp; sodium and chlorine, which we use daily in abundance.&nbsp; I have worked in</p><p>the optics and semiconductor industries where spin cleaning is usually performed without human</p><p>touch.&nbsp; The standard rule in these industries is that cleaning immediately after fabrication</p><p>removes residue. Subsequent cleaning leaves residue.&nbsp; However I could also be wrong.[/QUOTE]</p><p><br /></p>

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