Spent an hour and a half trying to get this turned off. Head manager finally gave the go-ahead to turn off CO2 tank. Tried everything humanly possible to fix it ourselves with the basics (warm water, button on green part, taking it off and putting it back

Spent an hour and a half trying to get this turned off. Head manager finally gave the go-ahead to turn off CO2 tank. Tried everything humanly possible to fix it ourselves with the basics (warm water, button on green part, taking it off and putting it back