Yeah I've been searching for some days and there isn't a standard formula/ratio and I have seen and read some iffy stuff. There's also alcohol that I have to add to the mix apparently.
What I did come across was a page from Celestron themselves on one of their support pages
http://www.celestron.com/support/kno...ctor+plates%3F
Funny thing is, they recommend using compressed air
By the look of it inside, I'd think it'll be it's first clean. Once it's done, that's it. There shouldn't be any need to do it again if it's stored correctly.
As far as I can work out like you say, it all comes down to common sense. I think I'll be right
