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frequency of cleaning will be based on individual use. Primary filter 1. Unplug the unit from electrical outlet. 2. Remove the dirt tank by pulling up on both handles to unlatch. 3. The filter is located inside the top portion of the vacuum. Pull either black tab towards the middle of the unit and remove. 4. Shake filter over trash can to release any loose debris. 5. Use a damp cloth to wipe the inside and outside of the filter if desired. Air dry thoroughly before replacing. 6. To replace, hold