My duck insists on laying her eggs in a muddy depression on the ground,and as a result, her eggs are always dirty. I wash them, but can never quite get rid of all of the stains. I want to sell them, and worry that the staining might be a turn off to customers. Will commercial egg-wash remove these stains? What has your experience been with selling duck eggs to customers? Do they mind the staining? My duck eggs are green and don't show a lot of the staining, but I still worry. Also, do any of you 're-seal' your eggs after washing? I read that commercial egg growers use mineral oil to reseal the eggs after washing, to help keep them fresh. Does anyone do this at home? Thanks for your input.