Not sure what to do she is off the eggs - silkie

[Seeing Silkies]

1 did not make it.. so i have 2 that are holding there own ( fingers crossed ) the one has a film/ goog/ pasty stuff or what ever it is gunked up on his feather any one know what it is or what i need to do for him.. oh what should i do with the hen? she is sitting in the box with nothing & I am not putting these back with her if they make.... Do I let her come off thebox on her own or am i sopposed to do something???
Thank You for being support to me in this mess & my stress is @ 100%