I totally did the "dance on top of your shower curtain in the tub" thing this weekend, & it worked! I needed, er, three dancings to get it clean (it had a LOT of crap on it), but it was miraculous. And fun, hahaha. I used dish soap & some vinegar & hydrogen peroxide (I don't know if the last two were needed, but I know in combination they kill a lot of germs & since I had them around from cleaning something else...).

Thanks for posting this--I remember reading it but didn't get around to trying it until now.