lol! i was going to chime in and say wait for a large poo too, but i see you've got all the bases covered. funny about the handle, though!
i had a huge DUUUUUH moment today as well. i was about to throw my accu-temp in the garbage today, as it didn't seem to be reading temps. at all. but before i did i decided to crank the baseboard heat and stick the sensor in to see if it senses such an extreme temp difference. it didn't.
until...i turned the switch from "inside" to "outside!" i guess in my head the sensor WAS inside, because it was in the incubator with the eggs. however the sensor is supposed to read OUTSIDE temps when used for non-reptile things.
LOL.
glad to hear you figured out what was up, and that you don't just have a mutant corn!