If I remember correctly, St. Christopher was allowed to retire after Vatican II. Too many people were just sticking him on their dash boards w/out actually doing their part... This sort of thing, IMHO, is a partnership between the saint invoked, and the people invoking doing their best.
But that's just me..
What suprises me, yet was what I was hoping for, was that he would get cold enough to go somewhat dormant, but not to the point of "too dormant". That delicate balance was made and happy ending.
Hetep