throttle STICKS

i have an 04cx my throttle sticks. it happened two years ago and the dealer said the fixed it but it is back and i can`t let my wife drive the thing like that. it only has 52,000 miles on it and i don`t want to get rid of it. but what to do. i tried to spray cleaner in the intake to clean it out but nothing. please any hlep would be helpfull.