I have the Suro too. First hatch in it went perfectly, second hatch last week was a disaster. The chicks didn't start hatching until day 23, the last one needed help on day 25. Some of the eggs were filled with gooey liquid which dried rock hard when it came into contact with the air so the chicks were pipping then getting glued into the shells. I ended up having to help most of them but I lost quite a few. I used my Spot Check thermometer to check that the temps were accurate - the middle of the bator was perfect but the sides were a half to one degree cooler. The humidity was also a little out but not enough to cause such awful issues I don't think. Do you have accurate temp/hygros that you can check your settings with? Sorry you are going through this, I know from experience it is horrible, especially when you pay money for a machine that is supposed to take all the stress out of hatching.