I had received the fore mentioned Anti Moisture Seals but I had already started lockdown with #2 incubator and #1 was a couple days into a new cycle. I opted to finish the hatching of both before I added the seals. Unexpectedly, #2 had 15 eggs pip all at the same time. When they started hatching like popcorn, the humidity spiked and the electronics were not happy. Luckily, I was right there when this started... both temperature and humidity read outs were starting to flash and the candling light was turning on by itself. I immediately manually released humidity by raising the lid slightly to release some humidity. I also removed all but the 2 most recent hatchlings as they were the cause of the high humidity. I was able to maintain correct settings until the humidity leveled off by raising the lid a tad and maintained it until only 4 unhatched eggs were left. It was a busy couple of hours moving chicks, setting up a brooder for them, etc. but it worked. Everything settled down and I was able to trust the 'bator to continue on its own.
Days later, when adding the seal, I found it very well explained on how to do so in the accompanying instructions other than the longer screws sent with the seal are too long. The ones that are in the circuit board already are the correct size. If you use the long ones, it does not fasten down tight enough to seal out moisture, nor will the push buttons on the top work. The seal is made to fit the same height as the posts that the screws go into, thus that is the size of screw needed. (If you were to use the long ones and snug them down to the tightness required to hold the circuit board, you would either need to drill the posts out a bit and risk damage to those posts or outside case, or cause damage to the posts when the longer screws bottom out and are still not tight enough.) I will be adding the seal to my #1 'bator before it reaches lock down. I plan to warm up #2 and swap lids to do this.
Another point: The humidity control was loose in #2 when I un-boxed it. The screw was the problem. It was stripped at the tip and would not stay tight. Every time the lever was moved the screw would unscrew. I was able to trade that screw with one of the same type from the lid cover attachment screws. Both are holding their parts in an admirable fashion.