During that 4 week period between ovulation and egg laying, they will nest down in the warm end of the enclosure, and a lot of times you'll see them laying in odd positions (laying belly up or on their side, or laying contorted) to keep themselves or the eggs comfortable. I try not to handle them at all during this time. They should have been off feed long ago so you shouldn't have any major cleaning that needs doing until eggs are laid unless they dump the water dish or something.