Ok, I know I should have bought a thing to read the humidity, but I was totally out of money after buying an incubator and all the eggs (we doing this with a preschool). Anyway, I have a Brinsea and filled the two sides of the pot on day 18 and started lockdown. Now I have three pips and lot of peeping. It's so exciting! But I also see that the water is getting low. Should I open it quickly and add warm water or leave it alone?