- Make sure the dust bag is not full. - Check the pre- and post-motor filters for debris. The pre-motor filter is washable in warm water and mild detergent. Make sure the filter is completely dry before reusing. The post-motor filter is not washable, this would have to be replaced. - Check the hose for debris. Work any debris out from the hose by massaging the area. If you are still having difficulty, please take your machine to a local Bissell service center for assistance. To locate your nearest BISSELL Authorized Service Center, go here http://www.bissell.com/support/product-support/service-centers. Enter your zip code to perform your search. You can also locate a Service Center by phone, 24 hours a day, by calling 1-800-237-7691 and choosing option #1.