ok so my little cousin came over and we decided to play some call of duty online. well he went to go get a soda and he did NOT spill it. but then my dog came in and knocked it over and it spilled on my ps3 controller. now my buttons are sticky and some of them won't work. PLEASE HELP ME im not going to pay another 55.00 bucks just for a controller. I will make the first answer best answer.
thanks to everyone that helped!

Do NOT!!! clean it with hot water. The PS3 controller operates by electricity, and water will completly ruin your controller!!! I recommend to let it dry, just leave it by a vent and don't touch it for a day. That should completly dry it internally. Next try and lubricate the buttons, just by pushing them all. That should make them unstuck and cause it to work. Don't soak it with water like the other guy said!

buy a third party controller for 20 bucks.