I just had a panic this morning myself when I couldn't budge the lid! It seemed jammed on.
I carry it to & from our apartment & our bush house & thought it had been knocked in the car(inside its case). My clever hubbie looked at it for me & after some careful easing of the lid from the right side location switch, we realised that it had not been completely turned off & the location switch had locked the jug in place! Scary as,like all of us, I am in a Chrissy cooking fest. After I relaxed & got back into cooking I though it was an interesting discovery & might be useful info for someone else who got into this situation.
It's something to look out for as the dial looked as if it was on zero but wasn't quite! Dont know how I'd got the lid on but my hubbie was able to too when the dial was in the wrong position & before we discovered the problem.
Anyone else had this experience?