i can't believe i'm posting a question about temps concerning my 1588! it's been a very reliable bator, and i believe it still is.....but yesterday i actually had to lift the lid and toggle the switches away from the factory setting. my temps were slowly climbing over a period of hours......but it was creeping up to 102....so i said "that's it" and i did what the directions said about how to change temps. it says it has a factory setting of 100 and not to believe the thermometer too much with the 1st hatch. i understand that...but this is my 2nd year hatching with this bator (and my 4th batch of eggs) and i've used the same thermometer (the one that came with it) as well as a digital therm/hyg that i bought at petsmart. i've NEVER had this problem before. anyway, i saw that the factory had it set on the number "4" switch. so i set to 3....seemed to help a little, but started creeping up again. so i set it to number 2....worked for a lil' longer, then started creeping again. had hubby go in and he toggled them ALL....then set it back on 2...then i unplugged it and plugged it back in....and i haven't had a problem since....of course i did this an hour before bed and then i checked it again in the middle of the night, and i checked it when i woke up....it's been staying at 100. but i'm wondering if there's anyone else out there with a 1588 who has had this problem? weird!!