I was allowed to wash my hair 48 hours after surgery (both times). Although it wasn't the easiest thing to do, I held a towel over the incision area to keep it dry and washed the rest of my hair without any problem. I also applied Neosporin on the incision every day to prevent infection from water, dirt, etc.
Hear Again
Left ear - Nucleus 24 Contour Advance with 3G
Implanted: 12/22/04 Activated: 1/18/05
Right ear - Nucleus Freedom
Implanted: 2/1/06 Activated: 3/1/06