hi there - I have a Lemond road bike that has a Shimano R600 compact double crank set. I have been riding this bike on some unpaved stretches and it's gotten pretty dirty with sand/dirt all over the frame and drivetrain.
I have been cleaning the frame and drive train using a hose and an old toothbrush. However, I have not yet cleaned the area near the bottom bracket, where the crank arm goes into the bearing. I have read in a repair guide that I should not use a water hose to spray near the bottom bracket to avoid forcing sand and grit into the sealed bearings.
However, I would like to clean out this are of my drivetrain. What are some recommended methods to safely remove the dirt and grit from this area?