I shrink smaller every time I take a bath. What am I?

Why this works

The answer to the riddle is "soap," and it works because of the clever play on words and the physical properties of soap. When soap is used, it dissolves in water, causing it to literally shrink in size each time it is washed or "takes a bath." The phrase "take a bath" refers both to the action of using soap in water and humorously implies the soap itself undergoing a bath, highlighting its gradual reduction in size. This riddle is a fun way to think about everyday objects in a different light!