Hey everybody. I've incubated clutches successfully for several years and never had this problem before. I am really hoping someone can provide me with some insight. These eggs are on day 13. The incubation media might be a bit wet, but you definitely can't squeeze any water out of it. Also, there is some condensation on my egg tubs, but it is on the top and the outside and is not dripping on the eggs. The eggs are incubated in vermiculite that clumps and then crumbles without releasing any water. The temperature is 88-90 (stable, not fluctuating, just depends on location in incubator). The affected area of egg doesn't feel any different to the touch, and there are still healthy looking veins throughout all portions of the eggs. Most eggs only have one or two small spots of discoloration, mostly on the bottom of the egg where it touches the incubation media. Pictured is the worst of the bunch.

Please let me know what you think! I've already added in more dry vermiculite but the problem isn't getting any better. Thanks so much!