We recently installed a Nest to control the heating and air conditioning. On a subsequent muggy day I was about to pick up the phone to call home and see if someone was there to turn on the AC (we were expecting guests) when I remembered that I could now do that remotely! I fired up the Nest app and just a few seconds later I happily settled back into work. An hour later when I showed up at home I was surprised it was still quite muggy until I realized that all the windows were open and our p...