I was given a bottle of that mousepad lube earlier, and it actually worked wonders on my Icemat. Razer Diamondback on a Icemat, with Glidepads under the mouse itself, and I can move the pointer if I just stare hard enough on the mouse.
But if I hadn't gotten it as a gift, I would never actually spend money on something like that. A piece of cloth to wipe the dust off once in a while should be enough for anyone that doesn't crap enormous amounts of money on a daily basis.