Ok, so I worded the fluctuation badly. I have to adjust my stats at least once a day, because of the temperature of my house. The cool side is usually fine and shuffles between 75º and 80º but can sometimes dip below 70 or rise above 80 depending on the house. I also have a huge window that affects my room temp. I will be moving soon to an environment with a much more stable temperature, thankfully, but until then my room is the only place for him.

The hot side is the bigger problem. It's true that it can fluctuate about 10º a day, but not all at once! That would definitely be a shock. It only wiggles about 5º up or down at a time. But again, because of my house, I usually have to adjust that side once a day. (I only set it one more degree above or below- that's enough of a change to fix it, usually.)

Hopefully that makes more sense.