First observation would be, try not to look too hard at your primary, especially if that involves shining any light on it. It will always look ghastly.
Second one would be if you absolutely
must clean it, this guide
http://www.iceinspace.com.au/63-345-0-0-1-0.html worked for me.
Reassembly will be slightly different as the make is different, but same principles apply. Mistake I made was over tightening the mirror clips which made the stars all look triangular!!
Remember, a mirror has to be pretty dirty before it seriously affects the image.
Cheers
Malcolm