Has anyone had this problem before. Went away for a couple of days so took wheel clamp off, reassembled it and put in garage. On return I am unable to unlock it, it seems as though the key will not go all way in. Tried spare keys with same result. At least it’s not on wheel and to be honest I would be a bit wary of clamping it to wheel if I ever get it apart. It’s the version that fits 16 inch wheel and is a couple of months shy of three years old. Ironically it’s predecessor a 15 inch version lasted over a decade with no problem, apart from rust. Have tried WD40 but can’t get at mechanics because of inbuilt security. Alternatively anyone interested in a large heavy paperweight