Ok I bought a used TurnX6. And I have plugged it in.. It doesnt seem to be warming up properly.. How long does it take to warm up? Do the coils get warm?? What about the little knob on it. Do you turn that to get different temperatures? If so which way do you turn for warmer. It doesnt say on it.. Please help me out with advice.. I hope I didnt buy an unworking incubator. The guy said it warmed up and held temperature. Its not doing that.. I have 3 different themometers in there.. Thank you..