Omg dude that's rough haha!! I've seen some pretty bad ones myself. A friend of a family member brought me over a pc that would shut down after only a few seconds of powering on. My first thought was- cpu overheating. So I opened it up and my jaw dropped. The amount of dust in there was on another level. This was years and years and years worth! It almost looked like a sheepskin rug, no, a big load of moldy cotton candy covering pretty much the entire board and all components! I don't even know how this thing survived lol... I put some gloves on and pulled all the dust off. I am alergic to dust btw (as silly as that sounds, I know), so this is my nightmare pc to work on >_< Anyways, it ran sweet after that as the fans were actually allowed to spin again haha I didn't charge them either. Just advised them to clean it once in a while! It's surprising though isn't it, how bad people let these things get!