I have notice mine turning yellow , but i have to say its from me being a heavy smoker. I noticed last month when i took the top off to clean it there was a big diff in the color i could see a outline of where the top fit to the rest of my case and i have only had my case for about 6 months. I wiped it down with a damp cloth and it looked good as new. I wish there was something i could do, i was thinking about even waxing my case to prevent it lol. I just need to stop smoking cause it is very nasty not to mention the dust that accumulates on the fans is sticky and had to clean. I added fan filters to all my intake fans and i'm hoping it will stop the dust. I'm gonna try to stop smoking soon but i have been smoking for 25 yrs so i don't know how well that will turn out
I see, goodluck to you, you should really stop smoking, it is really bad for your health and for the people around you (secondhand smoke) . Btw, thanks for your response and I think I'm gonna get the black/orange case .