After getting caught in the rain, I use Triflow to re-lube the pivot points on my calipers, and a little inside the casing (hard to get the tube in just the right place, but worthwhile when you do). Of course, I also do a good cleaning of all components, and a check of brake pad surface (for imbedded debris). If after these steps it is still sticky, then I use operators #2 and figure out where it is sticking. Then take the appropriate action.