I just set up my LG incubator the other day and had to go get a hygrometer. Wished I'd planned ahead and got the one on amazon with a built in hygrometer for only $48! Anyway, the hygrometer (digital) is also a thermometer and the temp it reads is a whole 3 degrees off from the glass thermometer that comes with the LG. which should I go by? Do I need to calibrate the glass thermometer? If so, how? Thanks!!