I have a 12 oz caanister of WD40 that I store inside the CR (easy access) for use in door hinges, etc. I have consumed about half already when suddenly the pressure inside the can seem to fade out. And can't use the other half anymore...questions: *Why did this happen? Is it the way it was stored? *Can I just puncture the can and get the unused WD40 out? Is it safe to do that? Hope you can give your feedback/experience... regards to all....!