Any of that will more than likely break your controller. You could disassemble the control & clean the buttons & case with the electronics removed but fair warning the PS3 controller is notoriously hard to get put back together properly. Your probably best off just getting a new controller.
Should I use Silicone Spray, Alcohol, or WD-40
Disassemble your controller and seperate the electronics from the plastics. Wash everything in warm, soapy water, give it a good rinse and let it dry. Then re-assemble.
I even threw a friend's plastic pieces of the controller in a dishwasher.