Rich, For some reason the URL won't link in the email. So go to the Arkansas Sky Observatory and click on "ASO Guides." This will bring up the important info on cleaning glass and mirrors. -- Joe From: Joe Bauman via Utah-Astronomy <utah-astronomy@mailman.xmission.com> To: Richard Tenney <retenney@yahoo.com>; Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Friday, January 2, 2015 12:00 AM Subject: Re: [Utah-astronomy] Telescope mirror cleaning Rich, I would not simply use PhotoFlo. Here is the best way to clean optical surfaces. I have done it at least twice and it's wonderful. http://www.arksky.org/asoclean.htm -- Joe From: Richard Tenney via Utah-Astronomy <utah-astronomy@mailman.xmission.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com>; UVAA <uvaa@mailman.xmission.com> Sent: Thursday, January 1, 2015 11:46 PM Subject: [Utah-astronomy] Telescope mirror cleaning Someone recently posted the following in the Criterion Dynascope email forum re: mirror cleaning, that I thought some of you might find useful/interesting. I had never heard of this stuff (and it's probably overkill, but what the heck)... "The best possible soap is Kodak PhotoFlo, which was designed as a last rinse for photographic film. It is the essence of all dish soaps, minus anything else. Still available from B&H and Adorama. Useful anytime you want to avoid water spots, like clear shower panels. It has to be diluted in distilled water 200:1 so a pint goes forever." FWIW,/Rich _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options". _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".