Cleaning in a dream often reflects emotional processing -- clearing out what no longer serves you, whether that's an old grudge, a habit, or clutter that's become symbolic of something heavier. A satisfying clean can point to genuine letting go, while a mess that keeps returning suggests the underlying issue isn't fully resolved yet.
The Moon in ruminating signs joined to retrograde planets, it is not then good to purge; the potion will work upward to the patients injury. - William Lilly (1602.-1681.)