Hmmm, there are so many possibilities. I could ask you to include it in your July presentation, as the subject is appropriate, but that is asking too much and I won't. It would be a great demonstration at SLAStrofest in May, or at a society meeting show and tell down the road. It's on the list of good ideas :) ----- Original Message ----- From: "Chuck Hards" <chuck.hards@gmail.com> To: "Joe Bauman" <josephmbauman@yahoo.com>, "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Tuesday, January 6, 2015 5:27:25 AM Subject: Re: [Utah-astronomy] [UVAA] Telescope mirror cleaning Mirror and lens cleaning is easy, and you don't need any uncommon materials to do it. I was a photo lab technician in a former life and am very familiar with PhotoFlo. You don't need it. All you need is a mild liquid dish soap and some ordinary distilled water for a final rinse. Guaranteed spot-and-streak free. I've been using these materials for decades with excellent results. There's no mystery or black art to it. Common sense and care during the process will yield a clean, streak and spot-free mirror with no coating damage. Some things don't need to be re-invented. Maybe optics cleaning would be a good subject for a club meeting one of these days. Next time I clean a mirror, I'll shoot some video and post it on You Tube or Photobucket. _______________________________________________ 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".