okay...almost time for my 1st duck egg to hatch and I can't get the humidity to 75%! I have the hova bator 2362 and it is air circulated. I have left one of the vent plugs in to contain moisture level and the water tray is full and I have added 3 bowls of water to increase humidity.and this morning increased temp to 98.5. Should I plug the other vent as well! this duck is really special to us....somebody please help.... any suggestions? btw...there is moisture on the windows of the bator.