Well done Becklinn!! I have had temp issues (without knowing it) on one of our hatches and we got chicks ON day 18..... so we had to be sure that our humidity was waaaaaay up before we candled for the day 18 right before lockdown candle. Be sure you have humidity waaaay up, candle again, throw out whatever you need to, and then put them back in. Then don't open it. DO NOT OPEN IT..... unless you need to add water, and even then, you shouldn't. Take out any turners you have going, and make sure your temp is right at 100 for a still air.
I have left our fan on (post manufacturer computer fan added by DH) during lockdown and never had a problem. All has been well and we're going in for our third and hopefully final hatch on Thursday. Bittersweet.