OKay I have 18 silkie eggs in my incubator i'm on day 10 I candled them this morning and they are all moving with great veining. but all day my temperature has been 4 degrees too low I don't know what happened I figure its one of two things 1. one of my kids messed with the temperature setting on the incubator, unlikely but possible. or 2. the batteries are dying in my flukers thermometer and the temp isn't reading right anymore. So how long should I expect the batteries to last? I used this thermometer for 1 hatch already so this would be 10 days into the second hatch so I guess its been running about 30 days. Should the battery last that long? I just don't know if I should turn the heat up till the thermometer reads 99.5 or leave it cool and get a new thermometer tomorrow (either way i'll probably go get a second thermometer) help!