Mine was like that too, the front left didnt quite touch a surface while the other three bumpers did, causing a slight wobble...i researched the problem a bit and was advised to do the "twist" method as stated above, I was a little weary but did go ahead and twist it, and all is fine now...you dont need to do it very hard at all, just put some pressure on the corner that is not lying flat, and you should be fine. The problem has not come back. Good luck!