i am a heating and air conditioning tech, been doing it for 15 years, i have been having trouble getting the humidity up in my home built incubator. you would think this would not be a problem for me because of my heating and air background. i manage to keep the humidity around 30% from the get go, but it is the last week of incubation, day 17 is this tuesday. i am going to put an aquarium air stone and pump in the incubator. my thought is that the bubbles produced by the pump in my container of water will cause the water to evaporate more quickly, thus raising the humidity. i have got the humidity up to 50%, but only for a brief time. i havn't tried the pump and stone yet. what i did notice, when the humidity rises rapidly, the temperature goes down and is slow to rise, which makes since to me, evaporation is a method of cooling. i really need to get everything right in the next day or two, my hatch is due November 12, if anyone has any more ideas for me, please help.