Had a bit of an annoying experience this afternoon: got locked out my my hostel, El Refugio! The owner, Peter, gave me a key to the front door when I arrived this morning; but when I tried to get back inside, after going down the road for some lunch, the key wouldn't work. I could feel the lock trying to open, but it just wouldn't. After trying to open the daym door for about an hour, I gave up and went for a bike ride. Anyway, when I got back this evening, Peter said that he hadn't been able to open the door either, this evening. Apparently, the problem has now been fixed, courtesy of a large amount of WD-40.