I recently bought a 12 egg incubator and this will be my first time using it but the celsius on the screen keeps going from 38.0 to 37.7. I’ve had the incubator on for about 3 days and every once in a while, the incubator keeps doing that. I have two hydrometers inside and one marks 97.6 but goes down to 96.5 and usually stays there, but my other hydrometer marks 99 but goes down to 98 and usually stays there as well. Will this be a problem for the eggs?