We lost all of our last batch of chicks, right at hatch, we just installed a computer fan, it is running great, however, I kept the temp. the same as before, right around 99.5 and it went up with the fan, I'm guessing due to the heat from it. I do not have a water wiggler, didn't know I needed one or a digital thermometer with probe, so I have 5 different thermometers and 1 digital, all reading about the same now with the fan, just wanted to know what they should be set at, gonna give this another try and pray for success, at least a few. I've learned my lesson on opening the incubator the last 3 days, with dealing with a staggered hatch, no more of that. Also, the eggs have been kept in the lower 60 degree range, up to 2 weeks, as we collected them, some may be too late, but we'll try. I have had the turner running, with the thermometers on top of it (I know it gives off heat too).