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<p>[QUOTE=&quot;GDJMSP, post: 803888, member: 112&quot;]There is a reason one should never use soap/detergent to clean coins. It&#039;s because it is all but impossible to rinse all the soap off the coins. There is always a residue from the soap left on the coins and over time it will have a detrimental effect on the coins.</p><p><br /></p><p>And you can call cleaning conservation if you like, but that too can lead to problems. For not all forms of conservation are harmless to the coin. It is far better, at least in my opinion, to use the terms harsh cleaning and cleaning. That at least clearly differentiates one from the other.</p><p><br /></p><p>Cleaning never harms or alters the surface of the coin.</p><p><br /></p><p>Harsh cleaning always harms or alters the surface of the coin. And even using chemical dips can be harsh cleaning. Dip a coin 1 too many times or for too long of a period and the coin is irreparably harmed.</p><p><br /></p><p>Even using the solvents that Thad recommends, if not done correctly, the coin be harmed by using them.[/QUOTE]</p><p><br /></p>

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