Finish the following sentence with the best choice: To keep your air conditioner running smoothly,

Choices:
- Take out the filter and wash it in warm soapy water.  Rinse and let dry.  Do this at least once a month during the summer.
- Take out the filter and wash it in warm soapy water.  Rinse and let dry. Do this at least once a day during the summer.

Answer:
Take out the filter and wash it in warm soapy water.  Rinse and let dry.  Do this at least once a month during the summer.