Your vacuum cleaner doesn’t need very much attention, but a little simple maintenance will keep it working and cleaning as efficiently as it can. Maintaining your vacuum cleaner properly can also head off more costly repairs or replacement.
Remove the bottom plate. It may have a couple of screws holding it in place. Don't lose the screws.
Use scissors or just your fingers to clean the brushes. They don't need to be spotless, but you should remove any hair or string that is wrapped around the brush. Pay special attention to the ends near the bearings and to the area around where the belt engages. A seam ripper (you can get one at a sewing goods store) works very well to cut the thinnest of hairs and strings wrapped around the brush.
Put the brush roll back through the belt. It may be very tight. Replace the brush roll in its slots. Make sure that the belt is still over both the brush roll and the drive shaft.