If your scale is displaying a constantly moving weight without settling on a stable reading, this can be caused by one of the following; -The floor may be unstable, please try using the scale on level flooring made of hardwood, concrete or tile. -There may be something touching the scale or under the scale, please inspect the bottom and surrounding areas and try again. -The user of the scale may be slightly unstable, please try remaining as stable as possible while weighing yourself. -One or more of the sensors may have been damaged, please contact support for further assistance.