Oh don't worry. If you have the humidity to high, the easiest way is to remove some of the water. It is hard to get the heat up if you have have the humidity to high. And several refernces have been made to hatching at slighlty lower temps than incubating. The egg temps drop when the hen leaves the nest, so 2 degree wont hurt to much. If you need to take some water out of your tray, that may help drop the humidity. That is the hard part with light bulb incubators. You get them set to work well at incbating, but when you raise the humidity to hatching, it takes about 12 hrs to get them back to 99.5. I don't thinsk at this end that 1 degree makes or brakes the hatch. It has more to do with the first 18 days. If your temp is a little low at hacth, it will just take an extra 12 hrs for them to get to hatch. That may be a bit better than 12 hrs to soon in my opinion. I have some that went on lock down last night. we will see. these I kept just a smidge cooler than my last bactch. and wetter during incubatoion, but will keep them at 55 to 58 during ahtch. We wil see. Last time I lost sevral at th end, . and the ones that hatched were about 12 hrs early. So i was a little to warm, and I think to wet during hatching. They were ready to hatch, but did not pip. This time I will hatch at little lower temp, little lower humidity and added extra air at lock down. we will see if I have a better hatch.