How do you bleach black and white mittens without bleaching the black?

I have this pair of black and white striped mittens and a scarf to match. Well, last winter the mittens got dropped into a muddy puddle [long story] and I threw them into the washing machine but now the mittens are greyish-white and black, and they don't match the scarf anymore. So long story short, how do you bleach black and white mittens without bleaching the black?|||just mix some bleach with some boiling water, and wet a sponge and dab the water into the white stripes, obviously not gettin the black too!! |||try soaking them in oxy clean and water overnight|||YOU SOAK THEM IN SOME LIQUID CALLED SOYLOVE SOMETHING LIKE THAT ITS A GREEN BOTTLE USUALLY THEY SELL THEM AT THE LAUNDRYMAT. FOR 15 MIN THEN YOU SCRUB WITH YOUR HANDS IT WORKS FOR ME.