My BB developed a squeak (before the ride through the flood) so I removed the dust seals and stuffed grease into the bearings. I wasn't sure about it being good, though, so I bought another one and put the old one into the parts box. The new one was in when I rode through the flood. After seeing water dripping out of the shell, I removed the BB because I figured it must be full of water. I put the previous one in, which I had greased and it's good, and still working well. Then I found out it's possible to take BBs apart, so I took the water-logged one apart, blew it out with compressed air, stuffed the bearings with grease and put it in the parts box. It's all good. I may never need it but it's better to have it and not need it... etc.