<human>:  How can I clean a white dress shirt?
<bot>: 
1. Start by sorting your white dress shirt into its washing categories.
2. Choose a detergent that is specifically formulated for white clothes so that it does not discolor the fabric.
3. Pre-treat the shirt for any stains.
4. Place your shirt in a washing machine and set the cycle to a gentle setting.
5. Once the cycle is complete, remove the shirt from the washing machine and hang it to dry.
6. If needed, after the shirt is completely dry, you can lightly iron your shirt to smooth out any wrinkles.