G'day all. Is there a senior experienced member in the Peel Region WA that could help me clean the inside of my Celestron 8 SCT corrector plate? I've never done it before and researching online tells me that it's not recommended. I'm just worried about taking it apart and putting it back together correctly.
The problem is I tried to clean the little bit of dust that was inside on it with a can of CO2 and what I've actually done is made all the dust that was in the OTA now sit on the inside correcter plate glass, I've made it worse

It looks like it has been taken apart before as there was some marks on the inside already, smudges etc. It needs to be collimated anyway so I'd rather clean it up as best I can first.
If there's anyone out there that could help me I'd be very grateful.
Cheers.
Dave.