I am praying that the heating unit for my hovabator arrives today. I have 50 eggs that are just barely incubating at about 98 F! My plan at the moment is to just quickly unscrew and replace the unit. THen for how long do I watch it and when will I know it is ok.... it is going to be set at 4 but I have an egg turner in and 50 eggs that are pretty warm though not up to temp. Does this need adjusting at all - I really don't want to do anything at all unless I need to. Any thoughts on this?