When hot, humid weather gets here this summer, here is one thing you can do to stay cool while you sleep without running your AC. Use thin lightweight sheets on your bed. In the morning take your sheets and pillow cases to the basement where it stays cool all day. Spread them out over a chair so the air gets to both sides. At night take them back up and put them on your bed. They’ll instantly cool your body. Or, to make them even cooler, put them in an air tight plastic bag and put it in your fridge during the day. Then take them out and put them back on your bed at night. They’ll instantly cool your body while you fall asleep.