Have any of you, or do any of you use it? I have a 13 week old kitten, and I am currently using regular kitty litter. To be honest, we have no selection in South Africa, but I have found silicone litter in the pet shops. At the moment the litter tray is smelling FOUL, even though I scoop the poop regularly, and change the whole litter tray about every 3 days. I have heard that the silicone doesn't cause as much smells, but other than that do you have any thoughts on it?