Polished macbook keys from usage
Hello there,
i would like to ask about the macbook pro 2016 model keyboard.
I am working daily on my macbook, and i noticed first something like grease on CMD key for example, or SPACE key.
But then i have cleaned the whole macbook, whiped it clean but the most frequently used keys on keyboard are still looking like polished, and they are different also on touch now than less used keys.
I have never noticed this on my previous macbook, is this material issue?
MacBook Pro 13", macOS 10.14