If you go to YouTube, just search for totally wicked. One of the videos is on SD maintenance.
I don't really bother with it much. Just scrub down the
threads with a paper towel and use a cotton tipped swab to get in the atty connections. Not much to it. Only thing I do with any regularity is check to make sure the button isn't coming loose by sticking my finger up against the screw and turning the button.