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I clean the primary mirrors on my 6” , 8” and 12” newts as follows -
Prepare laundry sink area bench with clean towel , 2 litre bottle of distilled water , half a dozen cotton balls and a few cotton tips
1/ Carefully remove mirror from scope and lay upright on clean towel
2/ Use hair dryer on cold to blow off any residual dust
3/ Hold mirror under spout in sink under warm water , not to strong , just light stream for a minute
4/ Repeat item 3 but this time place a few drops of plain washing up liquid on mirror and using a damp cotton ball , lightly work in a circular motion from centre to outside of mirror
5/ Rinse off in cold water and check mirror is clean , if not repeat item 4 and 5 again
6/ Pour a litre of distilled water over mirror whilst holding mirror on a 45 degree angle , let drops roll off and much as possible
7/ Lay backside of mirror on clean towel and remove any residual droplets with a cotton tip ( light dab only not wipe )
8/ Leave mirror to completely dry indoors and then re install back into scope
The above works on my mirrors which are 3 to 4 years old anc are in good condition
Hope the above is of some help
Cheers
Martin
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