XPS 15 9560, dirty carbon fibre reflection

Hello

Does anybody else notice that under certain lighting, the carbon fibre palmrest looks really dirty? For example:

With lighting that makes is look dirty: https://drive.google.com/open?id=1gBsCcSkXruQdB4fPmlGrMha5sqPSmgLJ
With lighting that makes is look clean: https://drive.google.com/open?id=1b2F1gw5TZMz8YteIBG2evEtG_WII6MNl

I didn't touch nor clean the palm rest between the pictures.

Thanks in advance and kind regards