I was examining the insides of my 8" Dobsonian with my new Red Led torch last night and the mirror was looking decidedly dusty. What's the solution to that? A long fluffy duster on a stick? (With care, of course.) I am now thinking that it's probably best to store the scope with the tube horizontal. Also, after my first view of Saturn and its rings (WOW) and the variegated patterns on Mars, the humidity went up and the whole thing was covered in condensation. What can you do about that? warming the tube up can't be good, optically but, there again, when you can't see through the finder scope and the tube is sopping wet . . . . Any expert opinions?