A couple of questions for PB 12 owners. 1) Have you done anything about the fingerprints and palmprints that gather on the machine, particularly the saline-looking stains where your palms rest, or on the outside of the machine? I want to try to clean this up, but haven't found anything that works thus far? 2) Has anyone noticed a discolouration or scratching of the wristrest area, little black specs in the silver finish? I have noticed it in the area of the left wristrest, and am wondering if it was caused by wearing a watch while using the machine. Anyone have any luck getting those out and/or preventing them in the first place? Any help would be muc appreciated.