Sleep Tight | Upd

Caffeine has a half-life of 5 to 6 hours. The quarter-life (the amount remaining when you try to sleep) is 10 to 12 hours.

Your body requires a core temperature drop of 1 to 2 degrees Fahrenheit to initiate and maintain sleep. Sleep Tight

Interestingly, the famous second line—“Don’t let the bed bugs bite”—is a much later addition. It doesn’t appear in print until the late 19th or early 20th century, well after “sleep tight” was already established. This suggests that people heard the alliterative “sleep tight” and wanted to add a playful, slightly scary, and memorable couplet. The bed bug line is a joke, a gentle tease, not an origin point. Caffeine has a half-life of 5 to 6 hours

Use blackout curtains or an eye mask to keep light from disrupting your melatonin production. Check Your Mattress: The bed bug line is a joke, a