Dandruff, is that how you spell it?

Anyways, despite Amelie's request not to talk about her hindquarters in public (she is a lady after all), I need to ask for some information. She has what seems to be dandruff on her bum, by the base of her tail. It does not seem to annoy/affect her in anyway, but I was just wondering if there is anything I could do to get rid of it? Is bathing the only option (Amelie hates that)?