I don't have good pics of denting eggs, but suggest you add moisture if you are using a hatching medium to the corners where it won't touch the eggs. I don't measure RH, I go by what the eggs are doing. I've had some dimple slightly at early stages & I add moisture; that's my cue.
About 10 days before hatching they will crease & that is normal. Pics of your eggs would help those of us who have hatched out clutches- we could help you best that way.