i dont have an SM
but
i would try and remove the assembly if possible-
then ever so gently
see if you can gently bend it with fingers-
if you determine it to be plastic
i would try warm water, not hot to start
i might let it relax, ever so slowly, back toward its original shape
i would be wary of either brittle plastic or metal-which could break altogether
sorry to hear this
the hopeful part is that if it slipped out during a run -hopefully it wasnt jammed too hard