There's so much nonsense floating around the Internet, ever noticed that? One recommendation was to use freshly squeezed vole dripping as an effective stain remover. Well it isn't. I've tried and tried and I'm almost out of voles. This conundrum must have arisen before in the long history of humankind surely, and been effectively dealt with. Grandma would have known, she knew about everything. But of course, she's already been eaten.