1. Check the brush and belt for damage. A damaged brush or belt may cause the vacuum to become difficult to push. If the belt is broken, you can click here to replace it: http://www.bissell.com/style-20-drive-belt-2032050?productid=17G5
2. If this doesn’t solve the problem, please call us at 1-800-237-7691, Monday - Friday 8 a.m. to 10 p.m., Saturday 9 a.m. to 8 p.m., or Sunday 10 a.m. to 7 p.m. ET. A representative will be ready and waiting to help you out!