Lockdown is very over rated. The bottom line is I have always opened my incubator when I need to. For instance I check after several have hatched and make sure that none are in trouble like having a shell caped over them or getting a leg out the pip because things like this can and does happen. The biggest thing I do is take a small spray bottle (that I keep warm in the bator) and spritz the eggs good before I shut it back up to replace lost humidity. I hatch over 1000 birds last year.