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Full Version: What's the latest train of thought on cleaning a freznel lens?
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MarcusJ
Well, after 3+ years of great use, (haven't even had to replace my bulb yet), my cooling fans have failed, (bearings went out), so as I'm tearing this thing down anyway, I figuare I might as well give it a good cleaning.

Just wonder what the latest opinions are on this subject.

I've been reading alot of "air only" posts, a few years ago I thought alcohol and a fine cloth was the perfered method.

Air only would actually save me a lot of tear down/rebuild time, but I've done the canned air thing before and it doesn't seem to work that well to me, but I've got my lens' out of the box now so it might be better. I was going to use an air compressor also for alot more power.

Thanks.
insertname
well if i'm and expert then jessica simpson is a genious however this is what I did:


So I get this great idea - hey I'm goning to clean this so I washed it - but ever so gently. I used a glass cleaner to clean it, and the softest towel I could find.

The cleaner stayed in the ridges after I wiped that side down ( truly needed it, the pj was noticeably brighter after) and I used caned air to blast anything else out.

no left over, dryed clear as brand new for me.

Now most of the folks at the mention of glass cleaner are wincing however I tested it harshly on a piece I had left from cutting them to size first heh. . didn't harm them one bit.
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MarcusJ
QUOTE (insertname @ Oct 1 2009, 11:56 AM) *
well if i'm and expert then jessica simpson is a genious however this is what I did:


So I get this great idea - hey I'm goning to clean this so I washed it - but ever so gently. I used a glass cleaner to clean it, and the softest towel I could find.

The cleaner stayed in the ridges after I wiped that side down ( truly needed it, the pj was noticeably brighter after) and I used caned air to blast anything else out.

no left over, dryed clear as brand new for me.

Now most of the folks at the mention of glass cleaner are wincing however I tested it harshly on a piece I had left from cutting them to size first heh. . didn't harm them one bit.
safety.gif



Thanks. Yea, everything I read says glass cleaner is bad. At this moment I'm thinking just water (I guess distilled??) and soft towel, and then lots of air to dry.
jonjandran
The genrally accepted way to clean them is distilled water with a drop of dishwashing soap. And a new paint brush to get in the grooves. And then drip dry.
SupraGuy
I'd personally omit the soap, unless I was also dealing with fingerprints, in which case, you need to break up oils.

Distilled water FTW. Canned air to start with, if they're visibly disty. Soap (Very little) if there are fingerprints.
MarcusJ
QUOTE (SupraGuy @ Oct 1 2009, 02:23 PM) *
I'd personally omit the soap, unless I was also dealing with fingerprints, in which case, you need to break up oils.

Distilled water FTW. Canned air to start with, if they're visibly disty. Soap (Very little) if there are fingerprints.



All clean. I just used distilled water, and a soft cloth, and lots of high pressure air. The air compressor was the best. I did air first and probably blew 95% of the dust off with that. Then water, and blew dry. Quick and easy. For some reason my heat shield streaked really bad, and I had to use some elbow grease on that.

Everything is back togeather, but I'm having some trouble refocusing it for some reason. Just need to play with it some more.
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