Thanks! I am now glad I put this post in whilst distilling. Excellent info; much of which I would of missed rushing into it. I know that many believe that the best method is not to clean it and to take preventative mesures in the first place, however as a newbie, I ended up facing my scope into some windy situation out in a dust bowel. A few sessions like that outin a dry paddock soon has the mirror looking slugish with a new coating you don't want. I found using a dust filter like dust cover on the bottom helps heaps. Open country spaces are really great, but with dry weather about, it's amazing just how much craps can end up in your tube. I am much more carefull now.