OK, I have been WAY babysitting my incubator..........
I had it set up right (except that I hadn't checked for cold spots) but then I noticed that the turner wasn't turning.....so I took it out and put the eggs back in. I don't mind hand turning, so no problem......
BUT, then the temp never came back up, I kept watching, and cranking up the heat, but it would NOT get up high enough.
So, I realized that the eggs had to be up higher (in the egg turner they had been maybe 6 inches higher up), but then, because of all my messing about, the higher up area was way too hot.
So..... After a couple of hours STARING at the incubator, I think everything is OK, and the temp will hold where I want it.