How do I clean the dust filter on my Frigidaire air conditioner?

Open the front panel, grasp the dust filter by the center, and pull it up and out. Wash it using liquid dishwashing detergent and warm water, rinse thoroughly, and gently shake out excess water, ensuring it is completely dry before replacing it. Alternatively, you may vacuum the filter clean instead of washing it. The dust filter should be checked at least once a month. (Page 20)