Yep saran wrap. A couple years ago a friend of mine called me freaking out because he had a female lay a clutch of eggs and when he tried to seperate the eggs he tore a tiny hole in one of the eggs. His incubator wasnt working right at the time so i told him to bring the clutch over to my house and we would put the clutch in mybwalk in bator. So he gets here and i cut a small piece of saran wrap and put it over the small hole and it stuck like glue. The egg survived and baby was all good.