<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
If we are clean before using bath towels then why do we need to wash them?
<|assistant|>
We need to wash bath towels because they become dirty with use, and if they are not cleaned, bacteria and other microorganisms can grow. Also, dirt and oil from the skin can accumulate and cause them to smell unpleasant or start to fall apart.