Back to the topic:
Last night I had to work a 12 hour night shift (flipping from dayshift I couldn't presleep). Lockdown was supposed to start at 8pm, but since I had to leave at 5, I did it then. These are D'uccle eggs and the last time I hatched them, they popped quickly and early. 
Anyway, I had washed it out a week ago and did a quick reassemble of the parts. I had it preheating. I threw in the distilled water, the layer of felt on the grate (holes cut for air flow) and trailed papertowel from the wells to the felt. This keeps the water wicking from below. 
I grabbed the 1 of 3 sets of eggs that were ready for lockdown. I laid them on the felt. I had time to make sure the temp was coming up to 99.5. 
I rushed off to work. I came home this morning at 7, peeked in and temp/humidity were stable. I got a whiff of vinegar. I figured it was lingering from the clean. After sleeping, I smelled it again. I pulled the bator open and smelled the paper towel trailing from below smelled like vinegar! Ugh, I guess I had some in there soaking from before??? I must have poured water on top. Anyway, glad I noticed before pips. Got it fixed... I guess I was too tired.