It is a good idea to spend the approximately $20.00 to $50.00 (Based on type of machine and service charges across the nation - parts, if used, are extra) to get your machine serviced by a qualified service technician at a vacuum specialty store. Service about once a year (or more often if you vacuum more than one hour a week or have pets) helps extend the life of your machine. What these technicians do is a complete overhaul. This includes, but is not limited to: taking the machine apart, checking and replacing parts as needed and cleaning in areas that are out of reach. Again, most people think the only time to bring their vacuum in for service is when something goes wrong. Do you wait for something to happen to your automobile before you get an oil change? Most service centers offer a free estimate. So check when calling or bringing your machine in for service.