Hi all,
My 10 inch DOB mirror looks pretty good in the day time, but at night when I shine a white torch down the tube it is fairly grotty.
I bought the scope about 5 weeks ago and the mirror looked good.
The viewing still looks good, and if I clean it now it will only get grotty again.
I don't want to clean it very often, and I take the usual precautions when using and storing ie, inside the house, horizontal with cap off untill dry, then cap on until next time.
There has been lots of dew over the last few weeks, and I have fitted a fan yesterday. Dew heaters on the finders and eyepieces were done a week ago and work well.
Cheers
Geoff
