I've used the regular Wallmart 91% rubbing alcohol, but most times I have a can of the denatured alcohol that I use to clean my gun barell. That stuff will absolutely remove any trace of oil from your hands or anything else I've used it on crystal, ceramic it evaporates really fast and leaves the surface clean and dry. Friend of mine spilled rem-oil on his slate and we eventually got it all off and back to normal with the alcohol. Just don't soak it down.... put some on a rag wipe it on air dry done
