Because it dissolves the plastic if you put a bit too much on it can take the shine away. But no colour change.
It is also dichloromethanol. Don't go putting it in your tea.
dichloromethane
FTFY
Also butanone (methyl ethyl ketone, MEK), although you're right to point out that the CH2Cl2 will probably be listed as the cause of death
@JurekB started
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Because it dissolves the plastic if you put a bit too much on it can take the shine away. But no colour change.