Go B&Q and get some stuff in a tube called evo stick seriously strong, its in a black tube ( you dont need one of those guns ) with silver and red writing, think its £6 for a tube, clean the inside up and squirt some of that inside it and then put the jack under it to hold it upto the car, i stuck my spoiler on with this stuff and ive pushed the car down the road, it does what it says on the tube ! lol