Why You Can’t Stop Hitting the Snooze Button

If you wake up every morning groggy, it might not be your pillow or the temperature in the room that's keeping you from getting a good night's sleep: It could be your smartphone addiction.

A new study from Deloitte found that one third of adults check their phones if they wake up in the middle of the night, as do nearly half of those under the age of 35.

Researchers have known for years that the blue-ish light smartphone screens emit can make it harder to fall back asleep.