There is not a removable filter on that model. The clean filter message is set on a timer as a reminder to wipe the area below the door every once in a while to keep it clean and clear of debris. This allows proper air flow. The message goes away on its own within 24-48 hours.
Please note:
This action will also remove this member from your connections and send a report to the site admin.
Please allow a few minutes for this process to complete.