Cleaning Dobsonian Mirror?

[discovery]

Hello,

I have noticed lately that the clarity of my observations has been declining, the mirror in my 12 inch Dob has a light coat of dust on it!

I haven't touched it since I bought it about 2 years ago.
Also could it be a collimation problem?

Where do I start? Should I even attempt to clean it? :shrug:

Cheers Joel

[Outbackmanyep]

I would check your collimation first!

[peter_4059]

Joel,
Try this...
http://www.iceinspace.com.au/63-345-0-0-1-0.html

It's no big deal to clean the mirror if you are careful.

[Blue Skies]

If it hasn't been done in two years then its probably time to tackle it. The link above is a good start. The biggest problem for beginners is usually collimating it again after you put it back together!