I washed the mirror of my 10 inch dob about a year ago cause I got careless with the canned air and some of the liquid left a stain on the mirror...Instead of letting it soak..I just washed the mirror under the tap until the stain lifted..then rinsed with distilled water with the mirror tilted..after which I used canned air to push the tiny water droplets off...Hey presto!..a nice clean mirror...And I DO lock both my cats out...
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