Although my last hatch was successful I got my first pip on day 19 and most of my hatch on day 20. My temp is running at 100.5 and I would like to go down 100 or even 99.5. The instructions provided with the bator are a little confusing. The thermostat is set on #4 do I just turn on #3 and turn off #4 to lower it the half degree and #2 for a full degree? I would be thankful for any advise.