Leave it alone and just ride. I've got sealed BB's with up to 10 seasons of my miserable winter rains and mud that have been not only ridden in this muck but also (carefully) cleaned with soap and brush and gentle water spray. The BB's are all still going strong with not a hint of mysterious noises yet. In fact they are getting BETTER with age rather than worse. My single speed spins the cranks backwards for something like 5 or 7 turns from a gentle pedal tap.