Condensation at any percentage is a sure sign (in my book) that you have sufficent humidity regardless of instramental readings. I'll have to research that possibility though. Logically I can see where that would cause a difference. But, if that is an end product of still air then the question would arise: Does a still air incubator need less humidity at lock down to equal the same expectations of a forced air?Throughout this thread, weather or not it was mentioned I'm not sure but I forgot to ask, still air could be the cause for condensation at lower humidity levels. Still probably enough moisture for hatching though I would think. If its forced air and you are getting condensation then I think its time to have a serious debate on what method of destroying your hydrometer you will take.