When it comes to cleaning high-pile carpets, an adjustable cleaning head is the key. If you have any carpeting like that, you should get a cleaning head for your vacuum to rise or fall with the carpet height. This is necessary because high-pile carpets (like shag, frieze, saxony, cable, or long plush) are quite problematic for some models. The long fibers tend to tangle around the brush roller and block the intake. This can essentially choke the vacuum. You can also try to clean longer rugs by turning off the brush roll or turning down the suction if the vacuum allows.