This is the same hovabator I've hatched dozens of batches in, hundreds of eggs, ducks, quail, and chicken. It's always held a steady steady temp. My last two batches have been complete flops, and it could be that they were bad batches of eggs (I have a couple reasons to think that may be true). Now I'm trying to stick some in there again, and have been working on stabilizing my incubator since yesterday morning. It will seem to be stable for two or three hours, then I'll go in to check one last time... and it will have shot up to 103 or 104. What the heck? I want to put the eggs in SOON because I've got a batch under a silkie, and these are her back-ups in case any of hers fail to develop. So I want them to be at the same stage of development. I didn't prep the incubator in advance because I'm an idiot. You'll want incy details: Hovabator 2362N, five years old Circulated air Auto turner Thermometer: Polder meat thermometer, guaranteed accurate to within 1/10 of a degree. I measure temp by inserting the prong through a vent hole. It reaches to roughly mid-egg height inside the incubator. It's about two years old. Is there something quick and easy we're likely to be able to fix this morning? Thanks!