Anybody else experience this? (warning ~ kinda gross!)

It's happened to me a few times. I think it comes from moisture getting trapped in there and the bacteria growing as a result. Warm and moist = breading groud for Bacteria. What I do to get rid of it, is to swab it out with alcohol after I shower until it's gone. Then if I feel even a twinge of itch I swab it out to prevent it from coming back.