Mrs. Singh, a non-English speaking patient had received instructions from her nurse on how to use the liquid antiseptic soap for her bath in preparation for her surgery the next day. After receiving instructions, the nurse asked if she had any questions, and Mrs. Singh smiled. The nurse took her smile as a 'No' and left the room. When the nurse returned to Mrs. Singh's room during her rounds, she found her emptying all the soap to wash her hands. What action should the nurse have done to make sure the patient understood the instructions?