A woman sends her clothing out to the Chinese laundry. When it comes back there are still stains in her panties. The next week she encloses a note to the Chinese man that says, "Use more soap on panties."
This goes on for several weeks, the woman sending the same note to the laundry. "Use more soap on panties."
Finally fed up the Chinese man responded with his own note that said, "Use more paper on ass."