How do I clean my LO's navel? There is some brownish substance around his navel..

Previously confinement nanny taught me and shown me to use lukewarm water and cotton bud to slowly and gently clean it using tip of cotton bud to clean the navel area. Remember before all this need to wash hands clean. I remember pd prescribe a type of powder to apply on the navel to aid in drying the stump area. When they are older I used cotton bud and soaked in baby oil and gently and slowly clean their navel. Sometimes they will request for Ru Yu Oil to be used on navel for cleaning. They love the smell.