I do like Cary with the screws to indicate the place to cut. I always use a new #11 Exacto blade and lube the heck out of the Exacto blade and surface of the pad before cutting. It should cut like butter on the Pachmyr pads.
I really don't like to put any type of petroleum oil (even the Vaseline) or even synthetics like the transmission fluid on a pad and frankly never saw the need. I use common hand lotion almost exclusively and it works as well as any thing else I've tried. The new silcone rubber pads may not be affected by hydrocarbon lubes, but why change my ways when it works?