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Hi All,
A very good subject Rob.
I have researched this subject from all over the net and found 101 differing answers.
from what I have found only clean eyepieces when absolutely necessary.
DILUTE windex or isopropanol with DISTILLED WATER.
Gently blow dust off first,and only use a COTTON swab of some sort as tissues etc,trap any remaining dust particles and cause scratching.
Never use too much liquid as it can get between lens elements and ruin them.
Personaly I use a lens pen on eyepieces,remove the dust with the brush,then very gently using a circular motion after breathing on the lens,clean with the tip of the lens pen.
Mirrors are a different ball game,most advice I have read suggest using distilled water and a cotton swab.DEFINATELY NOT a lens pen.
Regards.John
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