
The reason I posted this question is due to a Leupold scope I trashed using one of those lens pens. A tiny piece of grit escaped the brush and then scratched the lens when I used the felt pad end. That was maybe 30 years ago. I haven’t cleaned a scope lens ever since!In the field I use the Leupold Lens Pen that has a fine hair brush and an optic felt pad impregnated with lens cleaner
I’ve been wondering about canned air followed by a spray of rubbing alcohol.Canned air ??...Be careful you don't shatter your lenses.
Lens pens and or optical wipes is all I've ever used.
Good to knowThere's been a post or two of the effects of canned air on optics (shattered lenses) so there's that.
That air is ice cold coming out of the can.
Making any contact with optics lenses makes my teeth itch. Is there any way to clean scope lenses without making physical contact with the glass?
I too use the Leupold lens brushes but have never used the felt abrasive pad end, and -- after reading your post -- never will. If I need to rub lenses with anything more aggressive than a lens brush, I use a (freshly washed) microfiber cloth dampened with some 91% iso alcohol.The reason I posted this question is due to a Leupold scope I trashed using one of those lens pens. A tiny piece of grit escaped the brush and then scratched the lens when I used the felt pad end. That was maybe 30 years ago. I haven’t cleaned a scope lens ever since!
I'd try that in reverse order. Spray alcohol on the lens and blow it off with the canned air.I’ve been wondering about canned air followed by a spray of rubbing alcohol.
FWIW, some sources say you shouldn't spray alcohol directly onto the lens ... but rather, spray the cloth, then use the dampened cloth ... not sure why but that's what I've read.I'd try that in reverse order. Spray alcohol on the lens and blow it off with the canned air.

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