It may be something that will clear up once it gets adjusted to being outside of the egg. I found with my hatchlings that a few of them needed more calcium and D3 than they were getting with dusted feeders and were starting to show signs of MBD. I put a jar lid of calcium in their cages and they recovered right away. In order not to oversupplement, once they finished that calcium (it took a few weeks) I went back to only dusting the feeders and they remained fine. I imagine that a gecko may hatch that has an absorption problem which may or may not be fixable.