I've tried a mattress with water cooling and another that sways like a boat. I've worn brainwave-measuring helmets and rested on pillows that nudge you when you snore. In the hunt for better sleep, I've even snuggled up with a robot. For the gadget industry, sleep is the new exercise -- solvable with data. What Fitbits and Apple Watches did for getting moving, consumer tech now wants to do for getting Zs. A third of us suffer from sleep problems, a symptom of unhealthy diets, stress and too much time staring at screens. So does any of it work? This year at CES, the tech industry confab, I met makers of more than a dozen sleep gadgets that promise to make you feel, perform and look better. And at home, I've been testing the Tesla of snooze, a $5,000 Sleep Number 360 P6 smart mattress and frame. It monitors sleep and makes micro-adjustments to the mattress all night -- an automated Princess and the Pea.Fitbits alone didn't make Americans skinny, and these gadgets alone won't make us … [Read more...] about Rocking beds and pillows that nudge when you snore: Tech wants into your bed