umm no, dont use a crowbat and just put all of youre strength in it, youll mess up the gasket sealing surface since it is aluminum. and DO NOT use a freaking metal hammer, i hope the guy that was suggesting that was messing around. Just take a flatblade screwdriver with a clean rag over it and open it up, you cant just put pressure on one side, you have to get another screwdriver and do it to the other side at the same time. It has to lift striaght up, not one side up and then the other