Looking for some help with Dickey incubators. We have owned one for a year now and have recently experienced a significant drop in our hatch rate. We have the 3x1 model with autoturner and electronic thermostat. Our Process: 1. We collect and hold eggs for about 5 days. 2. Set the eggs and maintain the humidity between 42 and 50% the entire time. 3. We candle at day 7 and when we transfer to the hatching tray. 4. We mist the eggs according to how Mr. Dickey indicates in his instructions. 5. Move the eggs to the hatching tray on day 19. Prior to our last 4 sets, we were hatching in excess of 90% of our eggs and over the last few sets we have dropped to 50% at best. The only difference is that we have attempted to hatch more eggs at a time 85+ vs. 50. However, what has been very apparent is that the eggs located in the back of the hatching tray seem to have a much lower hatch rate. On our last 2 sets, we experimented with higher humidity (60%) and it did not help. Has anyone encountered this issue or does anyone have any words of wisdom?