yellowing
I've used Lacquer Thinner on power cords, as well as the trim on my Kirby 510 to take the discoloration off the vinyl/plastic. I read this tip when people were complaining about green cords on their G3s and someone suggested lacquer thinner. Do at your own risk, try a small spot where you can't see first cause i'm not sure what the material would be made out of.
If you want to try something that is 100% not harmful but great at cleaning, try a magic eraser with water.
