Double check it's sat properly in the lever and you've not taped it down without it being sat in fully. If that's fine then compressionless outer time for you, although I rarely find it's necessary with rim brakes unless there's a full housing run. Cannondale think it's better on the front of the headtube too, but they're wrong, leads to a lot of broken outers where they get bent right at that point.
Double check it's sat properly in the lever and you've not taped it down without it being sat in fully. If that's fine then compressionless outer time for you, although I rarely find it's necessary with rim brakes unless there's a full housing run. Cannondale think it's better on the front of the headtube too, but they're wrong, leads to a lot of broken outers where they get bent right at that point.