Hi there. I use an iSkin on my keyboard -- a transparent latex cover I type through -- which I periodically wash. Yesterday when I lifted it, there was an oily residue on the keyboard-facing side of the iSkin (i.e. not the side I touch typing). I inspected the keys and a number of them were a bit slick with what felt like oil. The residue was principally located toward the bottom middle semi-circle of the keboard. The G and H keys were slick, as was the space bar. Is the oily lubricant inside my iBook vapourizing, and being trapped by the iSkin? Curiouser and curiouser. Ta, Laura