ORIGINAL: proanti1
The only bearings I clean (and keep clean) are ceramics, because they're expensive. The normal ones I just replace when they get overly gritty. I used to pop the seals and attempt to clean/regrease them, but they almost seem to immediately get dirty again.
i use to do the same when i had metal sheilded ones but now i just run the rubber sheilded ones and rairly have any contamination issues. if i geta really gritty one ill run it till the replacement comes in the mail then i just tooss the old one.