Don't you love it when you come home to a sink full of dirty dishes with mold growing on them because you left home in such a rush three weeks ago that you didn't have time to wash them? I know I do...
Ew....I'd offer to wash them for you but....that's just.....gross.
Soak them in water and soap until all the mold dissolves off. Then toss them in the dishwasher.