This hack is for those crappy hotels that have the motion detectors and door open sensors above the doors that turn off the air conditioner when they detect no motion in the room.
Well all you have to do is pop that thing off the wall (it just snaps off so you can change the batteries) and if you have a screwdriver you can remove the magnet from the door. If you don't remove the magnet from the door you can just pick the sensor up and wave it when you want to kick the air back on . But if you do remove it you can just slide it back and forth by the sensor to trip the air back on.
Now I don't have to get out of bed to kick the air back on...