In reply to SmythFinn:
Don't use wd40. It gets everywhere no matter how careful you are and it's the last thing you want all over your hands when you're on a sketchy sea cliff. And it's a crap lubricant anyway.
Metolius cam lube is, unsurprisingly, perfect for the job and not even that pricey. If you're going to go out and buy something you don't have already, buy that.
Post edited at 07:34