I know that baby's hands are naturally quite cold at times, but I'm really worried about nighttimes. My daughter Nell is 4 months old and sleeps in a sleeping bag and a long sleeved body suit and pyjama top, which is supposedly fine for a nursery temperature of 18 degrees overnight. Her hands feel like blocks of ice though, and I don't know what to do. Do other people keep the room warmer or use scratch mittens or anything else?