Fractal design core 1000 usb 3.0 getting dirty.

[Jereez]

Fractal design core 1000 usb 3.0 front panel is getting dirty in front of the fan. Can this harm my computer ? There's still a good air flow and ecerything's working fine. Is it enough if i only clean it twice a year or more ?

 

[Gam3r01]

Twice a year cleaning is enough, more than enough IMO.
You can see the two dust circles where my two intake fans are. So long as temps are OK, and the fans are still running properly there is nothing wrong with a bit of dust.