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<p>[QUOTE=&quot;Just Carl, post: 171351, member: 4552&quot;]Note that Windex is a brand name. Many window cleaners have similar, but not exact, chemical compositions. Even Windex occationally changes their formulae. </p><p>Alcohol is basically a gas at room temperature so note that what you purchase usually says 70 % Alcohol. This indicates other chemicals are present and usually not always of a desireable composition. </p><p>Never, ever use tap water. Allowing it to stand will only dissipate the Chlorine used in many areas for germisiding purposes. Tap water also changes in composition practically hourly pending on the piping it goes through, your area you live, household water softeners, etc. If you ever let a pot of tap water evaporate completely you&#039;ll be shocked at the stuff left over that would be on your coins if used. Note that water softeners are basically a NaCl (salt) system. That is also why you should never use such water for plants. The NaCl will eventually kill plants. In water NaCl is ionic and will actually react with some coin materials.[/QUOTE]</p><p><br /></p>

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