The microwave has long been considered a miracle invention for a good reason: it reheats food in a cinch, cooks full meals in no time, and is energy efficient. One of the appliance’s handiest buttons is the express button, which instantly adds 30 seconds of cooking time, just enough to reheat leftovers or warm up your coffee. While that button is undoubtedly helpful, there is another under-utilized button that will change your microwave game: the power button.