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And yes, this does include your phone.

If it tells you the time, it’s a clock.

A woman lies in bed at night looking at the clock, unable to sleep

Should I sleep with a clock in the room?

But Dr Deutsch believes if you prioritize yoursleep hygiene, it shouldn’t be a problem.

(And thebest sleep trackerscan help you keep an eye on how much shut-eye you’re getting.)

A teen uses their phone in bed at night

For Dr Deutsch, removing the clock is part of optimizing your environment for good sleep.

But 15 minutes should be a general guideline, not a set time period.

Woman in bed with her hands over her face