Hi Joe Just blow it off with a hand bulb blower like they sell at camera stores. Do not use compressed air. Do not use any liquids they just make it worse. I have never seen any improvement when using the scope after cleaning. Clear Skies Don Colton -----Original Message----- From: utah-astronomy-bounces+djcolton=piol.com@mailman.xmission.com [mailto:utah-astronomy-bounces+djcolton=piol.com@mailman.xmission.com]On Behalf Of Joe Bauman Sent: Tuesday, April 13, 2004 8:50 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] seeking advice Hi Brent, Maybe I didn't pharse that right. It's an SCT. I don't want to clean the mirror, just the surface of the glass on top, immediately under the lens cap. I thought that was the corrector plate, but maybe I'm wrong! -- Joe _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.utahastronomy.com