I'm a heavy sleeper, but usually wake up to my iPhone alarm. I consistently sleep through it when my air conditioner is on. I can't sleep without the AC.
We're in a heatwave and I'm not going to be able to buy a different, louder alarm clock in the next few days. I've tried max volume and sleeping with my phone near my face.
How can I use my air conditioner and be jolted by my alarm in the morning?