Also, WD-40 is a much better degreaser/cleaner than a lubricant. I personally use it to clean things, but not to lubricate them. Simple Green is a great cleaner if your cams are really mucked up, but is probably not needed in most cases. I dilute it heavily with hot water, submerge the head of the cam and work the action back and forth. Obviously keep the sling dry, and rinse the cam thoroughly in fresh, hot water. Once dry, use any kind of bicycle lubricant - I buy the cheap stuff at Walmart. Get a pen w/ the tiny applicator straw so you can get into the tiny cracks and whatnot. You don't need much and you don't want your cams dripping.

5) Metolius Lube. It is just White Lightning.