So, kind of embarrassing, but I went to refill my tank this morning and for the life of me I can't unscrew it, or even get it to budge. I didn't tighten it on with Hulk rage or anything so I'm not sure what happened. The threading at the very bottom of the tank is the only thing you grip because above that is a rotatable airflow collar and above that is the glass tank that will unscrew so I'm literally working with millimeters here. I don't want to damage anything with pliers, so does anyone have any suggestions?

