Barton: A few months doxycycline hyclate 100mg ocular rosacea Still, it's perhaps unsurprising that we remain attached to our smartphones even during sleep. Many of us are glued to these devices all day, every day – triggering new buzzwords like "cell phone dependence." Research from the Pew Internet & American Life Project suggests that teens spend about an hour and a half texting each day, and 1 in 3 sends more than 100 text messages a day. At least 4 in 5 teens sleep with their phone on or near the bed, seemingly inviting sleep texting.