I had a question regarding my incubator. I'm using an igloo ice chest with 11" heat tape and a herpstat. I had it setup for about a month prior to the eggs and it held a nice temp with no problems. When I put the eggs and egg box in it was fine to start. I'm now two weeks in with the eggs. They look good. I'm getting a littel condensation on the lid of the box but not dripping on the eggs. The temps are fluctuating though. I have it set at 89 and it keeps going up a degree or down from time to time. The box has a separate thermometer it and I'm getting fluctuations in that as well. I've read the manual and seem to have it set correctly but aren't sure why I'm getting these ups and downs. I'd appreciate any input.