Yet another recommendation, and this one DEFINITELY works if you are game enough to try it...
Sun your itchy areas. Get in front of an open window or a door when the sun is streaming through, strip down, position so the sun is directly on the itchy spots, and sunbathe it for 5-10 minutes or so under good, strong sun. The sun will create tons of nice vitamin D for you and kill any beasties, no joke. One or two "blasts" should do it. (Of course, this is easier done for those of us who live way up in top floors of condos where no one else can see us lying nakey on the floor by the open balcoy door in mid-afternoon... But I've heard from ground-dwellers that sitting in front of a window at the right time works, as well. Not sure if it works through glass or not... )
Coonut oil is the next best thing for me for in the skin folds areas.