PB Blaster works pretty well to loosen up tools and get the snap back in them, but getting the stink out of the knife afterward is a chore.
What's PB Blaster?
After a 24 hour WD-40 soak, she is 90% back.
I just sprayed it down till the whole knife was dripping. Opened the tools a bunch of times and let it set for 24 hours. There was some kind of tar, glue or gunk in in everything.