Marks on front from keyboard

[09TIR98]

I've had my Z4 Tablet for 2 weeks now and i just noticed that there is 2 marks on the front of the device just where the keyboard touches the tablet.

[MarlonUk1]

try to have your device checked at your local service center. http://support.sonymobile.com/global-en/contactUs/

are you using the keyboard from sony? or is it a third party accessory

[Lord_viridis]

I have a mark on the back but nothing permanent on the front?
Have you tried wiping it off using a spectacle cleaning wipe?