Instead, the queen resorts to blackening Elisa's face and dirtying her hair, making her unrecognisable. Spyce Kitchen automated cooking units also clean up after cooking and dirtying the cooking apparatus. A ritual, which began as a washing ceremony, developed into a dirtying ceremony. This feature is useful when they burrow underground without dirtying their ears. The contrast was heightened, in Wilder's words, by "dirtying up" the sets.