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Water + baking soda
The rubber might be permanently damaged but you can salvage it with water and baking soda.
I had a similar problem with my mouse. I used baking soda dissolved in water to wipe it clean. It removed the stickiness but the rubber still did not feel the same as before, and it became sticky again after a couple weeks of use. So you probably ...
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If there is contamination left on the rubber, you could use a dish liquid solution on a warm damp dish cloth. Use care and try it along a bottom edge to see if it cleans without extra damage.
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Moisure is a problem for some 3D printer filaments. They are typically shipped in vacuum sealed bags with a small desiccant package within. Once opened, it can be challenging to keep the filament moisture free. I found plastic bins with a seal around the lid and clamping handles, but the desiccant bottles within would load up in short order, telling me the ...
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Some years ago, I stained some clothing with curry and nothing would remove the stain. Then, it accidentally got left on the washing line for 2 or 3 sunny days in a row - and the stain magically disappeared.
My assumption was that UV light is capable of chemically altering the organic compounds a lot quicker than the equivalent man-made dyes. It might be ...
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