Paul,
  One additional caution is the material that the towel is made of.  I
once used an old T-shirt as a cleaning rag and it started dissolving in my
hand!  It was not one of my old cotton shirts but turned out to be a
synthetic one and the solvent was dissolving it.  Since then I stick with
100% cotton rags or paper towels which are cellulose and do not dissolve
in these solvents.

Charlie
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Charlie Sturm, Jr
Research Associate - Section of Invertebrate Zoology
                     Carnegie Museum of Natural History, Pittsburgh, PA
Assistant Professor - Family Medicine

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