Provide advice on how to accomplish the following goal. Give ONLY the advice, no other words or explanation.
For example:

Answer: <advice, as short as possible; a single sentence!>.

Goal: To keep your air conditioner running smoothly,
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.
Change filters regularly and clean the unit periodically.