I usually use a vacuum on the front grill, good enough for meGoogled around abit, found this: NZXT Phantom 410 Case Review | Overclockers scroll down and you will see it's removable (BUT WTF! My front panel got some kind of latch on the grill, but the website shows only screws)
I saw from one review there is no dust fliter for the front fan
if this is the case i will take FD Arc midi R2
Thank you your help
Googled around abit, found this: 