I found that the LG still air was a total nightmare for me to maintain higher humidity for the last 3 days. I was trying to use it only as a hatcher. The room humidity was around 50%. I would fill all of the trenches, add a small bowl of water, a couple of sponges, and could get it to 65% for about 2 hours. By the next morning, it was down to 45-50%. The only way that I was able to get condensation on the windows was to add hot water, but within a couple hours, it was dry and back down to 50%.
I got frustrated because I had tried everything possible, and still couldn't maintain 65-70%. I finally just switched my turner over to the LG and tried my old hovabator as a hatcher. I filled the trenches on the Hova, added a wet sponge, (no bowl of water), and within an hour, it was at 78%. Overnight, it settled back to 68% and has stayed there for 3 days so far.
I'm just blown away by this. I used two different bators, in the exact same conditions, with one red plug left in in each of them, and one of them maintains humidity perfectly, and the other will not. I have no idea why, and I guess it's one of those mysterys that I'll never know.