I bought a new 25 eggs incubator 2-3 months ago. And I have placed eggs thrice in it and so far output/result is zero. First time placed 24 eggs, second time 8 and now 25. Today is 22nd day and so far no hatches. I have maintained 37.5 C temperature. But today I placed normal body temperature's thermometer for humans in the incubator and that was showing 39.4 C instead of 37.5. Difference of almost 2. Is this causing the problem?