OPTICAM binoculars - a strange coating sticking to the casing of the binoculars

Hello,
I have a question for you, I have OPTICAM binoculars, equipment that was not used at all, but was in the closet in its original case. Everything is fine, the optics is working, you can see everything does not distort anything, but there is a problem with a strange, sticky coating on the binoculars - the casing, visible in the photos


What is a sticky coating? There was no contact with any glue, the binoculars stopped working for two years and nobody used them.

What can the visible sticky coating be cleaned with? I tried to clean it with a cotton swab (you can see the hair in the photos) but I don't want to come off anything, and I don't want to use something that would damage the casing.

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Greetings,
Arthur

I had this with a computer mouse, I erased it with spirit.

@REMUR.. You say that the spirit helped, you talk about the typical 9X% or 40% is enough?

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Greetings,
Arthur

95% rectified spirit.

Thanks will try.

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Greetings,
Arthur

I recently had an external disk drive, the shiny metal parts of which were originally covered with a protective foil that would break after purchase. This foil could not be torn off after 25 years, and it just became such a sticky coating. I removed mine with a glass cleaner.

I will try both spirit and liquid. I'll let you know what will come of it.

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Greetings,
Arthur

Coming back to the topic, I tried several times to clean the binoculars with both alcohol and liquid and to no avail, nothing comes off this glue, as you can see in the photos in the first post.

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Greetings,
Arthur

From my observations, this "sticky" something comes just from rubber / gummed elements (I don't know what "sterilizes" or precipitates there).
I personally removed it with isopropyl alcohol, but the spirit should handle it better. With a friend it does not come off - you would probably have to use force - but it would require disassembling the lens, etc. and there is a significant risk of damage.

Ps
I once read in a magazine that this "sticky deposition" is a sort of "planned hardware aging" measure. I am skeptical about this theory, but the overall effect is similar .

This still remains extraction gasoline and acetone. With the latter very carefully, you need to do a trial first and stay away from plastics.

I advise you not to try acetone because you will destroy the casing.
If other remedies fail, try using turpentine, but be careful.
I had this one with a plastic housing for a screwdriver that was left for several years. This oxidizes poor quality plastic.

This is petroleum jelly or some other lubricant. The eyepiece moves forward / backward to adjust visual acuity and there is lubricant to keep it going lightly.

@REMUR.. I will tell you that I tried lightly with extraction gasoline and it does not come off, there was an attempt before and it is as it was.

krzysztofh wrote:

try to use turpentine but carefully

Yes, I ask what is turpentine ?.

krzysztofh wrote:

This oxidizes poor quality plastic

It is quite possible that it is a plastic that oxidizes under the influence of lying down and makes a tarnish like glue.

I also tried cleaning it with the WURTH universal remover, but I didn't beat it either.

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Greetings,
Arthur

Colleagues, I will tell you yes, I managed to get to grips with this raid / glue on the plastic on the casing, I was sitting, not hiding it, for a good 2 hours before I mastered it, but I was able to do it with alcohol.

In fact, when I cleaned it, cleaned it gently, there are nooks and crannies and such grooves I cleaned there with a cotton swab or a small brush, I admit it was like a yellow coating of glue, not even pleasant.

Yes, the binoculars were lying in the closet in a case for about 2 years, not used, and it never crossed my mind that it might be such a reaction that it is such a "shit" plastic.

So far, I managed to clean this coating / glue from practically every nook and cranny, everything is nice without any damage, scratches, or even a degree of plastic, etc.

Thank you very much to all of you for helping me get rid of this unpleasant raid from the binoculars' casing.

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Greetings,
Arthur