I also have an LG still air and every one of my eggs that I put into lockdown last time ended up hatching. I kept the humidity at 40-50% on thru day 18 (as instructed by other BYC members), then put wet paper towels in there to get it up to 70% for the last 3 days. Good luck!
I use paper towels in a small bowl in mine and wet them on the 18th day. Then I use a hose that's for a fish tank and a small bottle I got at Wal Mart. It's a travel bottle, it has nothing in it when you buy it. I put water in the bottle and hook the hose to it then I can put the hose in the top of the bator to add water right into the bowl and you don't need to open it.
Give them a couple of more days. If you temp went down they may be coming late. Good luck. Sending good vibes your way.
Thank you both for the encouragement! I really need it right now. I won't know what's going on until I get home this afternoon. Hopefully you are right, ginbart!! I really hope that little chick makes it!