TUrning off the Alarm

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I tried using the alarm to wake up in the morning, and it comes on fine. However, I can find no options to do a snooze and even worse, no way to turn it off. I've tried going into the alarm settings, unchecking the box for the alarm I set, and it still continues to go off (I have it set on repeat). It does stop after a while, but it's really annoying that I have to wait for it to make up its mind when it will stop.

Any idea?