To make the rudraksha beads to be healthy it need to take care certain things like
Clean the beads whenever u feel it seems dirty like some deposits is there or atleast 2months once u clean it properly.
soak it in luke warm water for half an hour or 1 hour.
Then with a new soft tooth brush clean the dirt which accumalated on the beads. Donot use any chemical soap to clean the beads.
Then for 1 day let the bead dry properly after that apply oil (any oil like oilive oil,coconut oil,sandalwood oil....) with the help of a brush to the beads to make it moisture.
Now its ready to use again like this way u can take care of your rudraksha beads.