Dusty iMac G5 Vent

I looked at the back of my iMac G5 the other day to plug something in one of the USB ports and realized that I've never really taken a good look at the back of my Mac since I got it about a year and a half ago. I came to this realization because when I looked slightly up, this is what I saw:

It was actually even a lot dirtier than it looks in the picture. The flash from the camera somehow made it look a little less dusty. In case you're wondering, that round thing is the vent where air is sucked in as part of the iMac G5's (the older versions have it placed somewhere else, if I'm not mistaken) cooling system. And I don't think having it covered in dust is a good thing. So do check those vents once in awhile and give them a good cleaning (using a dry cloth or tissue) to prevent dust build-up. Just a friendly reminder from PinoyMacLovers. :)