One chick has zipped it's shell but it's like the shell glued back down, or seeped something that glued the shell in place. I tried pulling some shell off but I think I pulled some fluff with it so I stopped. I did get some of the air sack end of the shell off and there is no blood veins there. I thought about putting the egg under running water but I'm afraid I might drown the chick. I wet paper towels and wrapped the egg, hoping that it might loosen the "glue" and put it back in the incubator. There is a 2nd chick who has zipped and it looks like the shell might be trying to glue down but I'm not going to mess with that one until I know for sure. Any suggestions as to what I can do that wouldn't risk the chick?