Rachel, Gretchen Anderson, Conservator at the Carnegie Museum of Natural History, and teacher of our Keeping Historic Houses & Museums Clean course suggests cleaning glass and plexi with isopropanol and deionized water. Use a microfiber cloth and use the liquid sparingly spraying it on the cloth, not on the glass. -- Brad Bredehoft CEO Museum Study, LLC www.MuseumStudy.com ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).