First clean with soft brush with the help of coconut water or ganga jal and paste sandalwood oil or paste on it.......
start using it as jaap mala
Regards
Rushabh shah
rudra rudra
You can wear any mukhi together. no harm no sit effect.
it is true that All should not wear 5 mukhi rudraksha justucheck your kundali..
if you have any problem than mail me.
Regards
Rushabh shah
Rudra Rudra