I received them about 11:30 this morning. Some people say let them sit about 6 hours, some say 8-10 and others say overnight????? I'm still kinda new to all of this so I don't know what to do. My only concern is that I won't be able to watch the temp or humidity while Im sleeping....and with 3 kids (2 under the age of 2), I don't feel like waking up in the middle of the night unless I HAVE to! So do you think it will be safe to let them sit til morning? It would be almost 24 hours??? Thanks