The agitator brush roller, found in many vacuum cleaners, plays a crucial role in loosening dirt, dust, and debris from carpets by using spinning bristles to agitate fibers, making it easier for the vacuum to suction them up. It also helps lift hair and pet fur. To maintain the roller, it's important to regularly clean it by removing tangled hair and debris, using scissors or a brush to clear blockages. Lubricating stiff bearings and checking the drive belt for wear is also recommended. Over time, the bristles may wear down, or the roller could become damaged or noisy, signaling the need for replacement. Typically, brush rollers last 1 to 3 years, but regular maintenance can extend their lifespan and keep the vacuum performing effectively.