Does anyone have any advice on the best way to clean the mirrors on a GSO RC8?
Ideally, given that collimation is a pain, I'd like to do it with the mirrors in situ. Is that possible or too risky?
Otherwise, looking for a minimal impact on mirror setup solution that is easy!
I am not looking for a perfectly clean mirror - just happy to take the worst of the grime off. I have had it for 9 years now and never worried about it - but it is now quite poor. I am not sure how much impact it is having on performance, but it seems like it might be sensible to at least get it a bit cleaner.
Edit: looking at it the other way, is there a good way to quantify the impact of the dirt (unfortunately I have no baseline data from when the mirror was clean though, other than the usual lights, flats)?