At least a couple of times over the last couple of weeks now my apple bell has failed to wake me to the right times in the morning, which led to me being delayed or sleeping over some events. I'm not really sure what's going on. Has anyone else had this problem and figured out why and solved it? I'm not sure if it's just that the alarm goes off and I don't feel it or the alarm just doesn't go even though I've set it every night. How long does the alarm go before it just stops?