It's adviced to replace the Side Brush every 3 months, replace the Washable Filter every 3 months, replace the Roller Brush every 6 months, replace the Dust Bag every 2 months, and replace the Washable Vacuum Mop Cloths every 2 months. Accessories Included: Replacement Side Brush ×4 Replacement High-Performance Filter ×2 Replacement Rolling Mop ×2 Replacement Dust Bag ×3 Replacement Rolling Brush ×1 Replacement Brush Guard ×1 Note: The eufy Accessories Subscription Service requires a monthly, quarterly, semi-annual, or annual subscription fee (depending on the service duration you select). Your subscription fee will be charged on the date of your first purchase and will begin a term. We will deliver accessory package items on a monthly, quarterly, semi-annual, or annual basis, depending on the service duration you select. You can cancel, suspend, or restart the subscription service at any time after purchasing the service.