be to operate? Now, I'm not sure I get it. It is a Krups, has a dial that goes from 1 to 10 (I think), a red light to the left of the dial, a green one to the right of the dial that seems to be on all the time. What is the proper number to be at for sandwiches? When is one or another light supposed to be on - or off? What is meant to be cooked at the highest temps? All help appreciated.