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<p>[QUOTE=&quot;cladking, post: 1308399, member: 68&quot;]Olive oil is best for soaking dirt off coins but should not be used on uncs or proofs.&nbsp; Mineral oil is OK but a second choice.&nbsp; </p><p><br /></p><p>I have very poor luck getting the oil off and the longer it soaks the harder.&nbsp; I find the best way is dish detergent but be sure to get it well rinsed afterward.&nbsp; It might take multiple attempts.&nbsp; I can&#039;t tell that leaving a tiny amount on does any damage but don&#039;t have a lot of experience yet.&nbsp; </p><p><br /></p><p>Everyone should understand to never clean a coin until they know how.&nbsp; Learn on junk coins and pocket change.&nbsp; It is far easier to destroy a coin with cleaning than to help it.&nbsp; The main thing you need to learn is how to identify coins that will be helped by cleaning rather than hurt.[/QUOTE]</p><p><br /></p>

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