Well I'm a heavy smoker and I must say this has worried me since reading about it. I wouldn't like to lose a PC worth around £800 to smoking. Basically what I saw was pictures of a CPU heatsink, and fans that were all like, clogged in tar and stuff and that frightened me but, I've been basically smoking next to my gaming PC for around 6 months and I can see into my transparent window on my case and the fans look okay and fairly clean, if not a little dusty after not yet being cleaned after 6 months, and my CPU heatsink looks fine also. It's still silver in colour and doesnt look bad, with maybe a few little specs of dust on it. If things look okay does that mean it is okay, or at least not affected by cigarette smoke? And why wouldn't this be affecting me? Would it be okay if I just cleaned it every 6 months to a year or? It doesn't ACTUALLY effect the electronics itself right? Just the fans? Idk man I'm worried help!