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<p>[QUOTE=&quot;Kentucky, post: 2278627, member: 33176&quot;]These coins have survived a couple of thousand years and you are not about to hurt them easily.&nbsp; Boiling is a good idea, but I would use tap water.&nbsp; In most areas of the United States, the water is 500 ppm or less dissolved solids...to put that in layman terms, it is 99.95% pure.&nbsp; Now, having said that, I would not like to boil tap water to dryness, because it will leave residue.&nbsp; Also, I would follow up cleaning steps, including boiling with a distilled water rinse.&nbsp; Instead of cotton swabs, I have used a toothbrush which has had the bristles cut down to half length to make them stiffer.&nbsp; Lots of on-line sources for cleaning protocols.&nbsp; Try this one:&nbsp; <a href="http://www.romanorum.com/docs/A%20Method%20for%20cleaning%20ancient%20coins.%20Romanorum.com.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.romanorum.com/docs/A%20Method%20for%20cleaning%20ancient%20coins.%20Romanorum.com.pdf" rel="nofollow">http://www.romanorum.com/docs/A Method for cleaning ancient coins. Romanorum.com.pdf</a>[/QUOTE]</p><p><br /></p>

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