6 days old.. Umbilical cord gooey?

kasey
Baby girl went to the doctors yesterday and they put some nitrate of some sort on her umbilical cord to help dry is out as it was still pretty moist. Today it's very gooey.. Should I be concerned? He said that it doesn't hurt her and to continue washing it with warm water and soap and we go back next Friday to have it checked along with her weight..
Any advice?