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Clear tape works fine. You may have to remove it when the chick pips on hatch day if they try and pip through the tape but other than that it should work fine.

I would not use duct tape because the adhesive on it is very acidic. You can use nail polish, tape will work, glue like elmers, or liquid bandaid, or wax will all work as long as the membrane is intact. If it's not then there really isn't much you can do at day 13.