Honestly? As long as the yolk is fully absorbed and everything looks good I hold them right under warm running water in the sink. Few seconds of that alternated with a few seconds of gentle wiping. Obviously I'm very careful they don't ingest any water. Once they're clean I dry them as much as possible and pop them back in the incubator to finish drying.How does one get the hard, dried, crusted goop off of a chick in the incubator? It’s tiny wing is stuck to its body. Eye lid is stuck closed on one side.