I am sure it is a bit of a silly question, but how do you test a slow cooker to see if it actually works? Obviously just cook something in it, but I don't have the food to potentially waste from sitting in a defective sc all day. I half filled my questionable sc with (cool) tap water about forty five minutes ago and set it to low. If I can find my thermometer I will check what the temperature is throughout the day and see what it's like. Beyond doing that?