I bought a used Dickey 300 egg Incubator. The wafers looked a little iffy so my husband replaced them. We hooked it up and everything worked. The temperature, however, is not stable. It cycles on every min. or so. I could tell from the thermometer that it wasn't staying exactly stable. I ordered a Brinsea spot check thermometer and it came today. Now I am really worried. The temperature is cycling from 96.7 - 100.7 every min. and a half. Up-down, up-down. It never stops. I am assuming that is not the proper way for the incubator to work. That's a 4 degree fluctuation every 1.5 minutes. Anyone have any ideas??