So you Advise
1) Dump all the Air
2) Stick it in/under Hot water for a couple of mins
3) But the reg in a vice
4) Turn the bottle (Clockwise or anti) as hard as possible?
Rather than dipping it into hot water, run the hot water from the tap directly onto the neck of the bottle. With the bottle nearest to you turn anti-clockwise to remove.
Its leaking?! Throw it away it could explode!!! Just another PMI bottle with a fault! Why take the risk of trying to fix it when for only £130 or so you could grab yourself a Stak... Dye throttle system thats 100% safe to use!