Crested gecko egg turning like a light tan color?

I've been incubating two eggs for 34 days and they seem to be doing fine. They've grown a bit but one recently began to turn into like a light tanish color. It's softer than the other one. The other one is white and looks good. I have the right humidity and temperature and there's no mold or anything growing on the egg. I only touch them when to wipe water off because sometimes water begins to drip from the lid. I'm just going to leave it alone and check up on it more often, but does anyone know why this happens?