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Mid 2010 Model A1278 / 2.4 or 2.66 GHz Core 2 Duo processor

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Weird smell coming from insides

Has it ever been found why old MacBooks from 2010-2012, after some years, start emiting a smell commonly described as a combination of burning crayons/body odor?

It’s coming from my 13" mid 2010 MacBook Pro, and after cleaning several large internal components, mostly the main chassis and keyboard, it still smells.

After reading online, it might come from aging plastics or adhesives already going bad.

Just as long as they aren’t toxic fumes or harmful, I guess I’ll just bear it.

Can anything be done? Are these smells toxic or harmful?

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If you look at the inside bottom cover you should see some foam over the thinner black plastic you want to remove it. Spray a nice perfume onto the cover that should help.

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