How long after pre-lay shed?

How many days after my females shed should I expect eggs? 30? Also how often should I open the egg box to let fresh air in?

Should be 27-30 days after their pre-lay shed. I opened my egg box once a week to let some fresh air in. I also dabbed any excess moisture off the eggs with a paper towel. The moisture would build up on the press and seal I used so I would wipe it off of there as well.