m15 R1, how to clean parts? (Middle of Keyboard and Power Button)

Hello! I am a vehicle developer.

I usually use 'Alienware M15'(I bought at last March).

I want to clean that part : Between Keyboard and Power Button. Mesh type Metal part! (Above Picture~).

But I couldn't remove some dusts that stuck there.

Is there good tips for cleaning them?

I already used a 'Vacuum Cleaner'. But failed! T_T