a lot of you know I built my onw bator. My first hatch was poor - about 40% 2/3 of them made it to the end then died. It was humidity. I couldn't get it above 40 - 45% during lock down. I changed the water system & tested & wow I can run at 80%. The thing is - the eggs went into lock down yesterday & I had the H in the mid 70's. I came back an hour later & it was 40%. I decided that there were too many holes - so I taped over the holes where the turner went in. The H came up to 50% & stayed there. I was on to something. I blocked off all the holes - no air at all. H jumped to over 80%. So I can control it. I poked some small holes in some of the tape & removed some covering holes all together so I have good air - but not so much. I was really wondering if my bator had enough air flow. It appears it has way too much air flow! By the way - I have a pip!