Why is the phrase squeaky clean a cliche?

The phrase "squeaky clean" is considered a cliché because it has been overused to describe something that is exceptionally clean or free of dirt and moral blemishes. Its origin from the sound of a clean surface, like a squeaky toy or floor, has made it a vivid but unoriginal expression. As language evolves, phrases like this can lose their impact due to frequent repetition, making them sound trite or unoriginal.