I just got an anitque Montgumery Ward iincubator and would really appreciate some help in getting it up and running under control. It is a 6 tray model and it has 2 wafer switches on the top. They both have a tag that says turn clockwise to lower temp. There are 4 adjustable vents on top and 2 on the door. The wafer switches seem to be wired in series. Anyone know how adjust this thing??.....stan