It can also be dirt that has entered the system or the sensitivity of the motors is exsessive than this may be the case of hardware faliure so see a professional . The motors will need replacing and the parts may be hard to find. First open it up measure the sise of the parts you need to replace and what their called(see manual) then find them online .(if you want to fix it yourself attempt at your own risk as the process may damage vital parts)If the product is brand new and it's not functioning properly than your device is defective and you will have to call wowee for support. (See website for number)