So we have a little giant incubator and are trying to get the temperature right before setting eggs. Unfortunately, we barely touch the thermostat adjustment and the temperature will jump or drop 10 degrees. It starts at 95, then we turn the thermostat just a *small* fraction of a turn warmer and then the termometer reads 105. Adjust it back down and it is at 93. Back up and we are at 110. This incubator does have the fan so the heat in theory should be fairly even. Any ideas on how to fix this? Is this a common problem for the Little Giant incubators?