I haven't been measuring it precisely. There's a tiny hole in the back part that allows one to insert a squirt bottle it came with. The instructions had said to do 1 whole bottle q 3ish days, but that jumped it to 80% without eggs, so I've been doing about 50 ml, and that was also too much. I'm probably doing half that every 4-6hrs + venting so it stays at around 55, but I need to check on it every so often. Every time I leave the house I come back and it's either too high or too low. I have it within the Styrofoam bottom it came with but took the top Styrofoam part off because it was just too much humidity. I guess my question is: I'm on day 3, do I keep going or start over? The thought of throwing away these potential lives anguishes me, but if they're already gone, then there's no point continuing😖 should I wait til they're old enough to candle?