I don't use a water wiggler...so ignorance is bliss for now! I have two temp probes that the tip rests on the floor. It hangs on the cables so the majority is at 'egg center' but it still only measures air temp. The case around the probe means it will always measure air temp even it touching the side, floor or an egg.
So, in an effort to to SOMETHING I started up our second incubator (Hova-bator still air modified with a CPU fan) Will be suing this for part one of our staggered hatch. We will be moving eggs tomorrow night for lock down, while our part 2 eggs continue to roll about in the first 'bator.
The time is near. A hatch window of 5 days is going to keep me busy. (Part 1 is Fri-Sun and part 2 is Sun-Tue if everything sticks to plan!)