I also put my sensor lead closer to my pot now. It was at 45% dead no fluxuation before thats why i figured I'd need it, but i zipped the sensor loosly to the handle of my pot letting it stick straight up about 3 inches over the top right now and the humidity by the pot is about 52-54%. Im sure it will shoot up now at night. My fan can pull about 400cfm and im running at 30% right now so im doubling the volume of the tent per minute to try and keep the humidity a little higher as well as the temps, but i removed the dome, underneath was already swampy as hellYes 60% - 80% RH is good for seedlings @ 80°F for germination the turn the temp down to 75°F - 80°F. The problem with humidity domes is not enough air flow and damping off is a common problem. They can be useful if you just cannot get the RH up.