Question How can I clean my silver Thinkpad's plastic?

Oct 9, 2019
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Hello,
I am using my laptop a lot, and the silver plastic is starting to look like a stain on my laptop.
I would like to know if anyone have experienced this sort of dirt\stain on their laptop, and if so, how did you clean it?
I have attached a photo of the dirty parts.
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On two sides, the darker areas are the ones which bother me.