not waking up to alarms

Hey, I've recently began having trouble with not waking up when an alarm goes off. Actually, I think I get up and turn it off, but have no memory of it. For example, today I took a nap starting at about 11AM and had 2 alarms set for 3PM so that I would wake up and get to 3:30 class and I woke up 15 minuteness ago with both alarms turned off. It's currently 5:03 PM.

Anybody know what causes this?

Also, I only got 1.5 hours of sleep last night, but this has also happened when I've gotten a nearly full night's sleep (6 hours or so).

I don't know what causes this but I can say it has happened to me before, even when getting 7 hours of sleep. I guess I just rise up, switch the alarm off, and fall back to sleep. I wake up again to find the alarm switch off with no recollection of making it that way.

you could try putting your alarm in a different location thats farther away from you, so you'll have to do more than reach out and press a button.

I've the same problem.

The only way to fix it for me, is to ask my father to open my door and switch the light on. It's pretty efficient, but not really pleasant...
I remember that when my alarm was set on FM, I used used to dream that i was with people on the radio, so no way to wake up.
I used to switch the alarm off without any recollection too.