My locks this morning were frozen shut so I poured some hot water in them to get them to thaw out. I’m thinking about spraying in some WD-40 to displace the moisture in there now. Once that's done, maybe use some graphite lock lube or something like that to keep it from sticking. Anybody have any other ideas?

 

I've used the lock lube. I generally just heat up the lock with a heat gun.