Sorry to revive a dead thread, but that seemed better than starting a new one.
I've recently upgraded from the "shake the hell out of the carboy" method, to the more reliable oxygen injection using a 2 micron diffusion stone. I'm a little paranoid about clogging it though. I've seen some posts either here or on techtalk about how to clean them when they get clogged, but can't seem to find them now. Any suggestions?