For 14 days my Little Giant has held a consistent 99-100 degrees. Then Tuesday it went up to 101 degrees all day, and then yesterday a consistent 102 degrees! I didn't want to mess with the knob but had no other choice. I regulated the temp to 99-100 but had to check it every two hours to make sure it wasn't spiking too high. Now I know why this was happening!! A few minutes ago while turning the eggs I decided to reset the memory on my thermometer-hydrometer. When I reset the humidity I realized it was stuck on the high memory reading! When I pressed reset it was at 21% only! I'm incubating duck eggs, and need at least 80%. For the past few days I've wondered why no matter how much I misted the eggs the humidity wouldn't change! Since the humidity has read 85% for about a week now I didn't think to even check the water rings, cups, or washcloths I added to the bottom of the bator. When I checked the water rings were very low, and the cups were empty. I panicked and immediately filled everything. Luckily I've been misting the eggs regularly or they might have not made it through this. I checked everyone and all are alive! The thermo-hydrometer has been great up to this point so I guess its not the hydrometers fault. I wish it didn't have that stupid memory setting!! This happened once with the temperature but that I found very quickly. Ill take this as a lesson learned....always check the water levels no matter what!!