Replying to HELP, my Yakima locks keep freezing

I am sure there is another post about this in the forums, but lets be honest, I am feeling lazy and don't want to go dig for it.
Any ways, the locks on my Yakima keep freezing up. I did not have this issue last year and am wondering what could have changed. If i breathe on them for a little bit they will open but that's such a pain in the dick. I have been told that WD-40 should work. But I wanted to see what everyone else thought. I am driving 4 hours for a ski trip this weekend so any advice asap would be awesome!