Ruby’s belly button took a while to heal. Once the cord finally came off, it was oozing and so they had to cauterize it. That didn’t work the first time so they had to do it again and then it was finally ok to give her a bath when she was a month old! Before then, just sponge baths. 
As always with newborns, she isn’t a fan :). But she she is cute and teeny huh!