I know all will laugh at me but my first hatch I tried my power went out. I was calling every 10 minutes asking when are you going to get this fixed. About 3 hours went by still no power so I took my eggs to my bed and put them under me. So get a good giggle but everyone of them hatched. I am 98.6 so I figured it was worth a try and it worked. Urban they can take the temp change for awhile and I am in your group for halloween hatch so will be there encouraging you on.